Cosmogenica in ADMD

Entries in the Antarctic Master Data Directory that relate to cosmogenic-nuclide exposure-age data

This list was put together simply by full-text search of the ADMD for words such as "cosmogenic," "exposure-age," and related terms.

Information in cells that are not red, yellow, or green is directly pulled from the ADMD entry.

Information in cells that are red, yellow, or green is my commentary. If it has so far been possible to obtain a decent amount of the data described in the entry, typically by following links but often by more devious methods, the cell is green. If not, it's red. Intermediate results are yellow.

Total ADMD entries: 34

Data as described and easily accessible (green): 14

Data sort of accessible or accessible elsewhere if you have special knowledge (yellow): 10

Data not yet accessible in a form resembling what was described: 10

I. Not so far possible to obtain data:


Data set title:		Rates of Quaternary Ice Movement Across the Vestfold Hills from Exposure Age Dating.
Link:		Link
Description:		The data set consist of in-situ cosmogenic Be-10 and Al-26 surface exposure ages for subglacial erratics in the Vestfold Hills. Samples were collected during the 1994/95 summer season and processed at the research School of Earth Sciences, ANU. Al-26/Al-27 and Be-10/Be-9 ratios were measured using the 14UD acellerator mass spectrometer at the Research School of Physical Sciences and Engineering, ANU.
PI name and email:		Derek Fabel dfabel@geog.gla.ac.uk
Data set contact name and email:		Data Officer AADC metadata@aad.gov.au
Creation date:		2000-08-09
Last update:		2014-08-29

Results of trying to get these data:		Following the link from the ADMD entry generated a result that "the file you have tried to download is not available for public access."
Success?:		NO


Data set title:		Surface exposure ages from Hjorth Hill, McMurdo Sound, Antarctica
Link:		Link
Description:		This data base contains information on cosmogenic helium-3 and beryllium-10 surface exposure dates on Ross Sea Drift moraine boulders from Hjorth Hill, McMurdo Sound, Antarctica (77 degrees 31' South, 163 degrees 37' East). This study was designed to combine surficial ages with a Ground Penetrating Radar data set generated by Dr. M. Prentice at the University of New Hampshire. Surface exposure dating relies on the build-up of cosmogenic nuclides in materials exposured to cosmic radiation. Because cosmogenic rays only penetrate 2 m in rock, freshly eroded glacial debris only begins accumulating cosmogenic nuclides after deposition from the glacier. When production rates are known the concentration of cosmogenic nuclides in moraine boulders can be used to date formation of end moraines and drift sheets. The samples were collected by M.D. Kurz and R. Ackert and colleagues during the 1990 and 1992 field seasons. The samples are archived at Woods Hole Oceanographic Institution. The ages, provided below in the table, provide age constraints on this important record of past fluctuations of the West Antarctic Ice Sheet. Surface exposure ages from Hjorth Hill --------------------------------------------3He 10Be Sample moraine Lithology mineral alt (m) Age (+-1 sig) Age (+-1 sig) ...........................................(kyrs) (kyrs) GP92-641-2 RS1r basalt olivine 300 40.0 0.8 KBA89-140 RS2 basalt olivine 310 56.7 1.8 KBA89-142 RS2 basalt olivine 310 83.3 2.7 KBA89-143 RS2 granite quartz 310 28.4 0.7 38.1 2.7 KBA89-148 RS2 quartzitequartz 310 47.9 0.6 48.2 0.7 DK92-477-3 W3 basalt olivine 365 21.4 0.8 DK92-477-4-1 W3 basalt cpx 365 40.6 1.2 DK92-477-4-2 W3 basalt cpx 365 29.3 1.7 3He ages calculated using production rate of 121 and 133 at/g/yr (sealevel, high lat) for olivine and quartz respectively. 10Be ages calculated using production rate of 5.1 at/g/yr RS1r=Ross Sea Drift recessional moraine S2= older Ross Sea Drift W3= Wilson-Piedmont drift
PI name and email:		Robert Ackert None
Data set contact name and email:		Mark Kurz mkurz@whoi.edu
Creation date:		2003-10-08
Last update:		2013-11-18

Results of trying to get these data:		The data set description gives some information on exposure ages that were measured, but not enough information to recalculate the exposure ages with current methods. The only link from the ADMD entry just got me to the WHOI web page, so didn't produce any data. I think some of these data may have been published by Ed Brook, but I haven't found the paper to check.
Success?:		NO


Data set title:		Exposure ages of glacial deposits, South Shetland Islands
Link:		Link
Description:		This data set contains cosmogenic nuclide exposure ages for glacial deposits on Livingston and King George Islands, in the South Shetlands archipelago. The majority come from moraines on the northwest shore of Hurd Peninsula, Livingston Island. A second group comes from the shores of Marion Cove, on King George Island. The ages are based on concentrations of the cosmogenic nuclides Be-10 and Cl-36, and are calculated using the production rates and associated data indicated in the footnotes. The data set includes all chemical and isotopic data needed to recompute the exposure ages if nuclide production rates or correction factors are revised in future.
PI name and email:		None None
Data set contact name and email:		John Stone stone@geology.washington.edu
Creation date:		2008-06-01
Last update:		2010-07-09

Results of trying to get these data:		The URL in this entry is dead.
Success?:		NO


Data set title:		Rock Samples for Cosmogenic Dating from the Darwin Glacier area
Link:		Link
Description:		Rocks were Collection of rock samples from the Darwin glacier area for cosmogenic dating and the data tables contain technical data required for cosmogenic dating analysis.
PI name and email:		Brian Storey bryan.storey@canterbury.ac.nz
Data set contact name and email:		Shulamit Gordon s.gordon@antarcticanz.govt.nz
Creation date:		2005-11-02
Last update:		2010-09-20

Results of trying to get these data:		No useful links in the entry.
Success?:		NO


Data set title:		Geomorphological information from the Darwin-Hatherton area, Antarctica
Link:		Link
Description:		Rock samples were collected from the Darwin Glacier region (6 samples) during the 06-07 season. Over 100 samples were collected from the Lake Wellman, Hatherton Glacier area during the 07-08 season. The samples were collected for cosmogenic dating. The data tables contain technical data required for cosmogenic dating analysis. Geomorphological mapping was completed in the Lake Wellman area in the 07-08 season. Individual rock samples were logged and recorded with information on each sample including date collected, geographic locality, grid reference (lat/long), altitude (m.asl), rock type/lithology, glacial stage/age, site description, surface character, depth/thickness, boulder dimensions, topographic shading, surface slope, picture number and comments.
PI name and email:		Brian Storey bryan.storey@canterbury.ac.nz
Data set contact name and email:		Shulamit Gordon s.gordon@antarcticanz.govt.nz
Creation date:		2005-07-26
Last update:		2010-09-20

Results of trying to get these data:		Link generated a 404 not found error.
Success?:		NO


Data set title:		Novel Be-10 and extraterrestrial He-3 depth profile in old, buried glacier ice of Mullins Glacier, upper Beacon Valley, Antarctica
Link:		Link
Description:		This research supports development of an innovative dating technique for application to ancient, relict ice bodies buried in the Western Dry Valleys of Antarctica. Dating of surrounding sediments and volcanic ashes indicates that these ice bodies may be up to six million years in age, offering the oldest direct atmospheric and climate records available. This work is a proof of concept to develop a new dating technique using beryllium (10Be) of cosmogenic origin from the atmosphere and extraterrestrial helium (3He) contained in interplanetary dust particles. Both tracers are deposited to the Earth's surface and likely incorporated into the ice matrix at constant rates. Radioactive decay of 10Be versus the stable extraterrestrial 3He signal may offer way to directly measure the age of the ice. The broader impacts of this work are development of a new analytical technique that may improve society's understanding of the potential for global climate change from the perspective of the deep time record.
PI name and email:		Gisela Winckler winckler@ldeo.columbia.edu
Data set contact name and email:		Joerg Schaefer schaefer@ldeo.columbia.edu
Creation date:		2007-12-17
Last update:		2007-12-19

Results of trying to get these data:		No links, no data.
Success?:		NO


Data set title:		Exposure ages of glacial deposits and bedrock surface samples, Beardmore and Shackleton Glaciers, Antarctica
Link:		Link
Description:		This data set contains cosmogenic nuclide exposure ages for glacial deposits and bedrock surface samples from the Transantarctic Mountains. The sites covered comprise The Cloudmaker, Mt Kyffin and Mt Hope on Beardmore Glacier, and Nilsen Peak, Mt Franke, Gemini Nunataks, Taylor Nunatak, Thanksgiving Point and Mt Heekin on Shackleton Glacier. The data are formatted for input into the CRONUS online calculator (http://hess.ess.washington.edu/math/). The calculator provides a means of calculating exposure ages using the present best estimates for the nuclide production rates. For bedrock samples, apparent exposure ages can be calculated from Be-10, Al-26 and in some cases Cl-36 data, and represent minimum limits on the cumulative exposure time of the surfaces; combinations of the Cl-36, Al-26 and Be-10 data in these samples can also be used to place constraints on the long-term ice-cover history of the samples.
PI name and email:		None None
Data set contact name and email:		John Stone stone@geology.washington.edu
Creation date:		2014-03-17
Last update:		2014-03-19

Results of trying to get these data:		The URL in this entry is dead.
Success?:		NO


Data set title:		Selected geomorphologic and stratigraphic investigations, Vestfold Hills
Link:		Link
Description:		From the short note: The ANTARES Accelerator Mass Spectrometry facility at the Australian Nuclear Science and Technology Organisation (ANSTO) is conducting a comprehensive program in the application of in-situ 10Be and 26Al cosmogenic radionuclides in the easrth sciences based on strong university collaborations. The program targets two major objectives: - (1) to determine and improve the Quaternary glacial chronology of the Southern Hemisphere in support of global climate change studies and (2), to characterise the processes of surface weathering and landscape evolution in semi-arid regions of the Australian continent. We have constructed and operate a fully equipped geochemistry laboratory for processing and perparation of in-situ AMS rock samples and have developed AMS techniques at ANTARES to measure these cosmogenic radioisotopes at the required sensitivity. Over the past few years, Antarctic rock samples (bedrock, erratics, gravels) have been collected from four sites whose glacial chronology is controlled primarily by the dynamics of the East Antarctic Ice Sheet. These sites are the Northern and Southern Prince Charles Mountains, Larsemann Hills, and Morozumi Ranges in North Victoria Land. The exposure ages from the NPCM and Larsemann Hills are complete and will be presented
PI name and email:		Eric Colhoun ggeac@cc.newcastle.edu.au
Data set contact name and email:		Data Officer AADC metadata@aad.gov.au
Creation date:		2000-08-08
Last update:		2014-08-29

Results of trying to get these data:		URL generated some project-related information, including links to publications, but no exposure-age data.
Success?:		NO


Data set title:		Beacon sandstones collected in the Skelton Neve region for cosmogenic dating
Link:		Link
Description:		6 Outcrop and Glacial erratic samples of Beacon Sandstone were collected from Escalade Peak, Tate Peak, Halfway Nunatak, Neve Nunatak and Clinker Bluff. These samples are accompanied by the geomorphic, petrographic, and structural information, and GPS position and elevation data.
PI name and email:		Richard Levy r.levy@gns.cri.nz
Data set contact name and email:		Shulamit Gordon s.gordon@antarcticanz.govt.nz
Creation date:		2012-01-23
Last update:		2012-01-23

Results of trying to get these data:		No links from provided URLs led to any data.
Success?:		NO


Data set title:		Exposure ages of glacial deposits in the Prince Charles Mountains, East Antarctica
Link:		Link
Description:		This data set consists of exposure ages for glacial deposits and glaciated bedrock surfaces in the Prince Charles Mountains, East Antarctica. Most samples come from moraines deposited during the last glacial maximum, approximately 12,000 - 20,000 yr B.P. The ages are based on concentrations of the cosmic-ray-produced nuclides Be-10, Al-26 and Cl-36. The primary data are sample locations and exposure ages. Ages are calculated using currently accepted nuclide production rates and correction factors. The data set also contains all details of the chemical and isotopic analyses needed to re-compute exposure ages if nuclide production rates or correction factors are revised in future.
PI name and email:		John Stone stone@geology.washington.edu
Data set contact name and email:		John Stone stone@geology.washington.edu
Creation date:		2002-11-21
Last update:		2010-07-09

Results of trying to get these data:		URL yielded nothing.
Success?:		NO

II. Partial success - possible to obtain at least some of the data described in the entry:


Data set title:		Cosmogenic noble gas measurements from Ong Valley, central Transantarctic Mountains
Link:		Link
Description:		This data set includes measurements of cosmogenic noble gas concentrations in surficial geologic materials in Ong Valley, central Transantarctic Mountains.
PI name and email:		Greg Balco gbalco@bgc.org
Data set contact name and email:		Greg Balco gbalco@bgc.org
Creation date:		2013-12-03
Last update:		2013-12-05

Results of trying to get these data:		Full disclosure: I'm responsible for the data repository here. One can follow the link from the ADMD entry to a web page containing large amounts of analytical data for cosmogenic noble gas measurements. However, site locations and other site-related data are lacking. Somewhat successful.
Success?:		PARTIAL


Data set title:		Cosmogenic nuclide data for bedrock samples from the Ford Ranges, Marie Byrd Land, West Antarctica
Link:		Link
Description:		This data set consists of cosmogenic nuclide concentrations in samples from bedrock surfaces in the Ford Ranges, Marie Byrd Land, West Antarctica. These surfaces have been exposed by ice retreat since the last glacial maximum, approximately 10,500 years ago. However, the majority of samples contain nuclide concentrations indicating much longer and more complicated exposure histories. The primary data are concentrations of the cosmic-ray-produced nuclides Be-10 and Al-26 measured in quartz, and Cl-36 measured in K-feldspar, sample locations, and the duration of recent exposure inferred from measurements on co-existing glacial erratics. In addition, the data set contains detailed information about the sites and samples, chemical compositions of the minerals analyzed and compositions of the host rocks, as required to compute nuclide production rates. This information is provided so that the data can be re-interpreted if nuclide production rates or correction factors are revised in future
PI name and email:		John Stone stone@geology.washington.edu
Data set contact name and email:		John Stone stone@geology.washington.edu
Creation date:		2005-04-06
Last update:		2012-01-31

Results of trying to get these data:		This entry is for "bedrock" data, as distinguished from data for glacial erratics. Corresponding data on glacial erratics are successfully accessible from a different entry. Following links from this entry, I could obtain the erratics data but no bedrock data. However, I was involved in collecting these data and I have some other knowledge. Some bedrock data are published in a paper by David Sugden (2005). Many others are in a MS thesis from the U. of Washington by Seth Cowdery. None of these are accessible by following links here. Partial success.
Success?:		PARTIAL


Data set title:		Stability of Landscapes and Ice Sheets in Dry Valleys, Antarctica: A Systematic Study of Exposure Ages of Soils and Surface Deposits
Link:		Link
Description:		This work will study cosmogenic isotope profiles of rock and sediment in the Dry Valleys of Antarctica to understand their origin. The results will provide important constraints on the history of the East Antarctic Ice Sheet. The near-perfect preservation of volcanic ash and overlying sediments suggests that hyperarid cold conditions have prevailed in the Dry Valleys for over 10 Myr. The survival of these sediments also suggests that warm-based ice has not entered the valley system and ice sheet expansion has been minimal. Other evidence, however, suggests that the Dry Valleys have experienced considerably more sediment erosion than generally believed: 1) the cosmogenic exposure ages of boulders and bedrock in the Valleys all show generally younger ages than volcanic ash deposits used to determine minimum ages of moraines and drifts, 2) there appears to be a discrepancy between the suggested extreme preservation of unconsolidated slope deposits (>10 Myr) and adjacent bedrock that has eroded 2.6-6 m during the same time interval. The fact that the till and moraine exposure ages generally post date the overlying volcanic ash deposits could reflect expansion of continental ice sheet into the Dry Valleys with cold-based ice, thus both preserving the landscape and shielding the surfaces from cosmic radiation. Another plausible explanation of the young cosmogenic exposure ages is erosion of the sediments and gradual exhumation of formerly buried boulders to the surface. Cosmogenic isotope systematics are especially well suited to address these questions. We will measure multiple cosmogenic isotopes in profiles of rock and sediment to determine the minimum exposure ages, the degree of soil stability or mixing, and the shielding history of surfaces by cold based ice. We expect to obtain unambiguous minimum ages for deposits. In addition, we should be able to identify areas disturbed by periglacial activity, constrain the timing of such activity, and account for the patchy preservation of important stratigraphic markers such as volcanic ash. The broader impacts of this project include graduate and undergraduate education, and improving our understanding of the dynamics of Southern Hemisphere climate on timescales of millions of years, which has major implications for understanding the controls and impacts of global climate change.
PI name and email:		None None
Data set contact name and email:		Jaakko Putkonen putkonen@u.washington.edu
Creation date:		2007-11-20
Last update:		2010-07-09

Results of trying to get these data:		Disclaimer: I was involved in collecting these data. Following the links from this ADMD entry gets you a description of the project. I happen to know independently, however, that all the data collected in this project are either in the ICE-D database already or on a data repository page at BGC. So you can get the data freely online, but you need additional knowledge to do so.
Success?:		PARTIAL


Data set title:		Cosmogenic He-3 data from surface sediments above old buried ice in Beacon Valley, Antarctica
Link:		Link
Description:		The cosmogenic He-3 data set created during this project provides three major constraints: The cosmogenic 3He survey from Mullins Glaciers allows us to calculate for the first time paleo-flow rates of a glacier on the million year time scale. A simple calculation yields a paleo-flow rate of < a few mm/yr over the last 4 My. This result is in striking agreement with the modern flow rates based on InSar data reported by Rignot et al (Rignot et al., 2002), indicating that Mullins Glacier flow velocity remained relatively constant over millions of years. The finding that a rather sensitive local rock glacier remained dynamically stable over millions of years can only be explained by very consistent climate conditions and the near absence of significant climate changes. The depth profile experiment of surface sediment overlying the old buried ice in Beacon Valley indicates (i) that there have been probably some geomorphic processes active in the upper layer of the sublimation tills reworking the simple 'deeper is older' stratigraphy; (ii) the cobble survey from the polygon center shows high degree of variety in 'sublimation age' and disintegration and weathering characteristics of individual boulders, that is not mirrored by different morphologic appearances of the surfaces (all look old). * The cosmogenic He-3 chronology from Kennar Glacier is one of the best glacial chronologies ranging from 10,000 to 3,000,000 yr to date, yielding a pulse of small amplitude glaciations.
PI name and email:		Joerg Schaefer schaefer@ldeo.columbia.edu
Data set contact name and email:		Joerg Schaefer schaefer@ldeo.columbia.edu
Creation date:		2007-12-10
Last update:		2007-12-11

Results of trying to get these data:		The only link in this entry led to the LDEO main web page. The Kennar Valley erratic data were published by Kate Swanger and I believe the depth profile data have been published as well. So the data are available, but not from any info in this entry. Partial success.
Success?:		PARTIAL


Data set title:		Mapping and sampling of ice moulded bedrock, erratic boulders, moraines and calcite precipitates for exposure age dating using cosmogenic nuclides, from the Rennick Glacier area, north Victoria Land
Link:		Link
Description:		A detailed assessment of the history of local ice dome and outlet glacier fluctuations in the Rennick Glacier area of north Victoria Land, which contains a record of global climate driven outlet glacier fluctuations, was undertaken to establish the extent and dynamics of late Cenozoic Antarctic ice sheet fluctuations in the region. In the lower Rennick Glacier area, moraines and ice eroded bedrock surfaces were mapped in the Morozumi Range to Helliwell Hills area. Ice-moulded bedrock and quartz-rich erratic boulders were sampled for exposure age dating using cosmogenic nuclides (CNs) (10Be and 26Al), Uranium series dating (U-Th/He) and apatite fission track dating. A number of sites in the Boggs Valley (Helliwell Hills) had subglacially precipitated calcite mantling ice moulded bedrock hummocks and samples were taken for exposure age dating (Uranium series dating) and oxygen and carbon isotopic analysis. In the upper Rennick Glacier region, mapping and CNs sampling efforts were carried out, specifically in the area between the Mesa Range and extending west to Lichen and Caudal Hills. The glacial landforms and ice abraded surface in the upper Rennick Glacier area was mapped. Sites with well preserved moraines and erratic boulders in stable positions suitable for dating using CNs were encountered and sampled in the Lichen, Vantage, Illusion and Caudal Hills, as well as the western side of the Mesa Range. The results from this study will help to determine the history of the east Antarctic ice sheet which is essential to the ongoing and crucial debate regarding the long term stability of the ice sheet and sensitivity of the ice sheets to climate change.
PI name and email:		Paul Augustinus p.augustinus@auckland.ac.nz
Data set contact name and email:		Shulamit Gordon s.gordon@antarcticanz.govt.nz
Creation date:		2005-09-22
Last update:		2008-08-21

Results of trying to get these data:		No links to data given in this entry, but there is a reference to a MSc thesis that is said to contain the data.
Success?:		PARTIAL


Data set title:		Exposure ages of glacial deposits and bedrock, Scott Glacier, Antarctica
Link:		Link
Description:		This data set consists of exposure ages for glacial deposits on nunataks and ice-free areas adjacent to Scott Glacier, Transantarctic Mountains. Most samples are glacially transported clasts deposited during the last glacial period or exposed by subsequent retreat of the glacier, ca. 16,000 yr B.P. to present. These ages are based on concentrations of the cosmic-ray-produced nuclide Be-10. There are also data from bedrock samples on Mt Rigby, which have longer and more complicated exposure histories. For these samples, concentrations of the cosmogenic nuclides Al-26 and Be-10, and associated "ages" are the result of repeated exposure punctuated with periods of ice cover and may have been affected by glacial erosion. Apparent ages for the bedrock samples should not be taken as indicative of prolonged single-stage exposure. The primary data are sample locations and exposure ages. Ages are calculated using currently accepted nuclide production rates and correction factors, as described in the footnotes. The data set also contains chemical and isotopic data needed to re-compute exposure ages if nuclide production rates or correction factors are revised in future.
PI name and email:		None None
Data set contact name and email:		John Stone stone@geology.washington.edu
Creation date:		2011-08-05
Last update:		2012-06-04

Results of trying to get these data:		URL dead. Fortunately, however, I had already downloaded a copy of this data set at a previous time when the URL was not dead.
Success?:		PARTIAL


Data set title:		Using rock and sediment samples from raised beach ridges and glacier moraines for dating to determine the extent of the ice sheet during the last glacial maximum
Link:		Link
Description:		Raised beaches on the coast of McMurdo Sound have developed since the last glacial maximum approximately 20,000 year ago when the ice sheets were at their greatest extent. The weight of the overlying ice depressed the land which has slowly rebounded after the ice melted, forming a series of beach ridges. The beach ridges and associated rock platforms were dated using three different methods and the relative heights above sea level today were obtained. This data will allow modelling of the volume and extent of the ice during the last glacial maximum. Radiocarbon dating of shells and fossil penguin remains found in situ, optically stimulated luminescence dating of sediments and cosmogenic isotope dating of surface exposed rocks, including glacial and ice rafted erratics and rock platforms associated with the raised beaches, was conducted at Marble Point, Kolich Point, Spike Cape, Dunlop Island, Cape Bernacchi, Cape Roberts, Cape Geology, Cape Ross, Cape Bird and Cape Hallett. Modern beach formation processes were observed and were linked to features in the raised beaches to give an accurate position of where sea level was on the raised beaches. Detailed descriptions were made from sections, using evidence at the surface as well as digging holes in strategic locations. Information from the holes included the structure of the beach ridge, pebble counts to work out maximum energy and development of the beach from imbrication. A chronology of ice retreat was determined using surface exposure dating techniques from a series of samples taken at different heights above sea level. Some samples were taken from above the marine limit to help with timing of ice retreat from along the coastal area. Sample sites are tied in with current sea level estimates to provide a height of uplift. Observations of glacial moraines were done by mapping the extent of the various rock types that make up the moraines by a combination of noting where volcanic erratics were found, with line counts and area counts. Surface exposure dating was carried out using cosmogenic isotopes from large erratics droupped out of the glaciers as they retreated.
PI name and email:		Julie Quinn julieq@tpg.com.au
Data set contact name and email:		Shulamit Gordon s.gordon@antarcticanz.govt.nz
Creation date:		2009-02-03
Last update:		2009-02-12

Results of trying to get these data:		No links. Contains a reference to a PhD dissertation that is said to contain the data.
Success?:		PARTIAL


Data set title:		Glacial geology studies in Queen Maud Land, Antarctica during seasons 1989/90 and 1993/94 and 1997/98
Link:		Link
Description:		Glacial geological observations including striae measurements. Samples for geochemical analyses, cosmogenic isotope analyses, radiocarbon analyses. Grain-size and geochemical analyse results and radiocarbon dating results from snow petrel stomach oil deposits. Spatial Coverage: Nunataks in Vestfjella; Basen, Plogen, Fossilryggen, Muren, Utpostane and nunataks in Heimefrontfjella; Haldorsentoppen, Mygehenget, Ristighortane. Western Queen Maud Land, Antarctica.
PI name and email:		None None
Data set contact name and email:		Petri Lintinen petri.lintinen@gtk.ti
Creation date:		2006-04-05
Last update:		2006-04-06

Results of trying to get these data:		No useful links. However, the entry does list a few related publications.
Success?:		PARTIAL


Data set title:		Collaborative Research: West Antarctic Ice Sheet Stability
Link:		Link
Description:		The data set describes the cosmogenic 3He, 21Ne, and 10Be exposure ages of erratics and bedrock samples from the Ohio Range near the head of Mercer Ice Stream (formerly Ice Stream A) in the West Antarctic Ice Sheet (WAIS). The field location is situated in the 'Bottleneck,' a unique, relatively narrow passage in the Transantarctic Mountains connecting the West and East Antarctic ice sheets. The location lies near the ice divide. The location of the glacial erractics constrain interior ice elevation in the past while the exposure ages constrain the timing of the ice highstand. Exposure ages of erractics along Mercer Ridge, on the Buckyee Table, provide a local proxy climate record. Glaciers on the Mercer Ridge are sensitive to changes in accumulation of snow and predominant wind direction. Compared to the record of the adjacent WAIS ice sheet fluctuations, the timing of alpine glacier advance yields information on climate changes in the Ohio Range that can be used to test climate reconstructions based on Antarctic ice core records.
PI name and email:		Sujoy Mukhopadhyay sujoy@eps.harvard.edu
Data set contact name and email:		Sujoy Mukhopadhyay sujoy@eps.harvard.edu
Creation date:		2007-08-02
Last update:		2007-11-14

Results of trying to get these data:		The 'get data' URL goes to a defunct web page. Independently I do know that these data are mostly published.
Success?:		PARTIAL


Data set title:		3He exposure dates from Mount Waesche, Marie Byrd Land
Link:		Link
Description:		The data are 3He exposure ages from lateral moraine bands on Mount Waesche, a volcanic nunatak in Marie Byrd Land, West Antarctica. The proximal part of the moraine is up to 45 meters above the present ice level was deposited approximately 10,000 years ago, well after the glacial maximum in the Ross Embayment. The upper distal part of the moraine may record multiple earlier ice advances. The data are all generated by crushing and melting mineral separates (mostly olivine) in vacuo, and measurements with a noble gas mass spectrometer at Woods Hole Oceanographic Institution. Full details can be found in Ackert et al. (Science, 1999, vol. 286, p.276-280).
PI name and email:		Mark Kurz mkurz@whoi.edu
Data set contact name and email:		Mark Kurz mkurz@whoi.edu
Creation date:		2004-11-19
Last update:		2010-07-21

Results of trying to get these data:		No useful URLs given in entry, but I know independently that most of these data are in Robert Ackert's dissertation and have been published elsewhere.
Success?:		PARTIAL

III. Possible to obtain more or less all the data described in the entry:


Data set title:		Cosmogenic nuclide data for glacial erratics - Marble Hills, Ellsworth Mountains, Antarctica
Link:		Link
Description:		This data set consists of cosmogenic nuclide concentrations in glacial erratics from the Marble Hills, a group of peaks in the southern Heritage Range, Antarctica. Approximately one-third of these samples have Holocene exposure ages, indicating that they have been exposed by thinning of the West Antarctic Ice Sheet since the last glacial maximum (LGM). The remainder of the samples contain high concentrations of cosmogenic Be-10 and Al-26, indicating more prolonged exposure, either at their present locations or at a source further inland. The primary data are sample locations, correction factors relating to calculation of exposure ages, and concentrations of the cosmic-ray-produced nuclides Be-10 and Al-26, measured in quartz. We list conventional exposure ages for the samples, but have also provided sufficient information to allow the ages to be recomputed if nuclide production rates or correction factors are revised in future.
PI name and email:		John Stone stone@geology.washington.edu
Data set contact name and email:		John Stone stone@geology.washington.edu
Creation date:		2006-04-02
Last update:		2010-07-09

Results of trying to get these data:		Got it by following links. All good.
Success?:		YES


Data set title:		Glacial history of the Framnes Mountains, East Antarctica
Link:		Link
Description:		Geological evidence from the Framnes Mountain, East Antarctica, will reveal changes in ice thickness from the Last Glacial Maximum 20,000 years ago to the present. A computer simulation of changes in ice thickness will show how the ice sheet interacts with climate and sea level, which is important for predicting future changes. Cosmogenic isotope samples were taken from 29 locations including Welch Island (1 sample), Mawson area (1 sample), Mt Henderson area (7 samples), and the northern (13 samples), central (3 samples) and southern (2 samples) Masson ranges. No samples were taken from the Casey Range or the David Range (with the exception of the Mt Hordern area (2 samples). Mapping of the glacial geology was undertaken - few trimlines were evident and moraines where present consisted dominantly of local lithologies. The glacial clasts sampled for cosmogenic isotope analysis were felsic erratics perched on or near to stable hilltop surfaces, with clear sky exposure (conditions ideal for cosmogenic isotope dating). Sediment analyses to support interpretations of the glacial history are being undertaken in 2004-2005. The fields in this dataset are: Site Location Altitude Erratic Rock Gravel Sand Salt Schmidt Hammer Weathering
PI name and email:		Damian Gore damian.gore@mq.edu.au
Data set contact name and email:		Data Officer AADC metadata@aad.gov.au
Creation date:		2001-04-09
Last update:		2014-08-28

Results of trying to get these data:		Followed links to a lot of raw sample-related data resembling a post-field-season data dump. This is basically what was described in the entry. OK.
Success?:		YES


Data set title:		Cosmogenic dating
Link:		Link
Description:		The data set consists of cosmogenic exposure ages for samples collected by Research School of Earth Sciences in the Prince Charles Mountains and vicinity. Thus far work has been carried out in the 2001/2002, 2002/2003, 2003/2004 and 2004/2005 field seasons. Currently, the only data publicly available is an excel spreadsheet detailing sampling locations. The objectives of this project were: To develop a comprehensive understanding of the Lambert Glacier of East Antarctica, from the time of the last maximum glaciation to the present, through an integrated and interdisciplinary study combining new field evidence - ice retreat history from cosmogenic exposure dating, geodetic measurements of crustal rebound, satellite measurements of present ice heights and changes therein - with other geological and glaciological data and numerical geophysical modelling advances. The project contributes to the quantitative characterisation of the complex interactions between ice-sheets, oceans and solid earth within the climate system. Outcomes have implications for geophysics, glaciology, geomorphology, climate, and past and future sea-level change. This work was completed as part of ASAC projects 2502 and 2516 (ASAC_2502 and ASAC_2516). The fields in this dataset are: Sample Date Collector Type Lithology Location Elevation Latitude Longitude
PI name and email:		Derek Fabel dfabel@geog.gla.ac.uk
Data set contact name and email:		Data Officer AADC metadata@aad.gov.au
Creation date:		2002-05-19
Last update:		2014-09-11

Results of trying to get these data:		The URL successfully produced a spreadsheet of sample locations as described in the entry. However, no analytical data.
Success?:		YES


Data set title:		Reedy Glacier Exposure Ages, Antarctica
Link:		Link
Description:		This data set contains site, sample, and analytical data from which to calculate cosmogenic nuclide-based exposure ages for glacial deposits adjacent to Reedy Glacier, Antarctica. The data are formatted as input for the CRONUS online exposure-age calculator (http://www.hess.ess.edu/), which determines the exposure age from the cosmogenic Beryllium-10 and Aluminum-26 production rates.
PI name and email:		None None
Data set contact name and email:		NSIDC AGDC USER SERVICES nsidc@nsidc.org
Creation date:		2015-03-30
Last update:		2015-04-07

Results of trying to get these data:		The link successfully yielded a spreadsheet of exposure-age data. These data have also mostly been published by Claire Todd.
Success?:		YES


Data set title:		Southern prince charles mountains: sediments and salts
Link:		Link
Description:		Field analysis of included quantification of clast rounding and lithology, and weathering features such as tafoni, elongated pitting, sand accumulations, frost shattering, glacial polish, and the degree of weathering based on the Moriwaki et. al. 1991 and 1994 scheme. Schmidt hammer tests on boulders were undertaken at approximately 30 sites. Approximately 200 sediment (predominantly glacial but also some glaciofluvial, lacustrine and aeolian), 50 surface salt and 100 cosmogenic exposure age samples were taken from the Southern Prince Charles mountains during the PCMEGA (Prince Charles Mountains Expedition of Germany and Australia) expedition of the 2002/03 summer. The matrix (less than 2 mm fraction) of the sediments are to be subjected to grain size and elemental analysis. Approximately 20 cosmogenic exposure age samples will be selected to date glacial highstands. Aspects of the data are to be used for various publications on glacial history, and geomorphic agents active in the region. The download file contains a large number of images taken as part of this project, plus an excel spreadsheet of data with an accompanying word document. This work was undertaken as part of the PCMEGA project, and was part of ASAC project 1071 (ASAC_1071).
PI name and email:		Damian Gore damian.gore@mq.edu.au
Data set contact name and email:		Data Officer AADC metadata@aad.gov.au
Creation date:		2003-06-24
Last update:		2014-08-27

Results of trying to get these data:		Following link produced lots of field data and photos. No exposure-age data.
Success?:		YES


Data set title:		Collaborative Research: Pleistocene East Antarctic Ice Sheet History as Recorded in Sediment Provenance and Chronology of High-elevation TAM Moraines
Link:		Link
Description:		The proposed work will investigate changes in the compositional variation of glacial tills over time across two concentric sequences of Pleistocene moraines located adjacent to the heads of East Antarctic outlet glaciers in the Transantarctic Mountains (TAM). The chronologic framework for this work will be generated from cosmogenic exposure ages of boulders on prominent morainal ridges. The PIs hypothesize that variations in till composition may indicate a change in ice flow direction or a change in the composition of the original source area, while ages of the moraines provide a long-term terrestrial perspective on ice sheet dynamics. Both results are vital for modeling experiments that aim to reconstruct the East Antarctic Ice Sheet and assess its role in the global climate system and its potential impact on global sea level rise. The variation of till compositions through time also allows for a more accurate interpretation of sediment cores from the Ross Sea and the Southern Ocean. Additionally, till exposures at the head of some East Antarctic outlet glaciers have been shown to contain subglacial material derived from East Antarctic bedrock, providing a window through the ice to view East Antarctica's inaccessible bedrock. Till samples will be collected from two well-preserved sequences of moraine crests at Mt. Howe (head of Scott Glacier) and Mt. Achernar (between Beardmore and Nimrod Glaciers). Each size fraction in glacial till provides potentially valuable information, and the PIs will measure the petrography of the clast and sand fractions, quantitative X-ray diffraction on the crushed <2mm fraction, elemental abundance of the silt/clay fraction, and U/Pb of detrital zircons in the sand fraction. Data collection will rely on established methods previously used in this region and the PIs will also explore new methods to assess their efficacy. On the same moraines crests sampled for provenance studies, the PIs will sample for cosmogenic surface exposure analyses to provide a chronologic framework at the sites for provenance changes through time.
PI name and email:		Michael Kaplan mkaplan@ldeo.columbia.edu
Data set contact name and email:		Robert Arko info@usap-data.org
Creation date:		2014-07-17
Last update:		2014-07-18

Results of trying to get these data:		Followed links to obtain a spreadsheet of sample locations and a few exposure-age data.
Success?:		YES


Data set title:		Exposure ages of glacial deposits, Reedy Glacier, Transantarctic Mountains
Link:		Link
Description:		This data set consists of exposure ages for glacial deposits on nunataks and ice-free areas adjacent to Reedy Glacier, Transantarctic Mountains. Most samples are glacially transported clasts exposed during the last glacial period or by subsequent retreat of the glacier, ca. 16,000 yr B.P. to present. There are also data from a few samples from older deposits, which may have more complicated exposure histories. For these samples, the exposure ages indicated should be treated as lower limits. The ages are based on concentrations of the cosmic-ray-produced nuclide Be-10. The primary data are sample locations and exposure ages. Ages are calculated using currently accepted nuclide production rates and correction factors, as described in the footnotes. The data set also contains chemical and isotopic data needed to re-compute exposure ages if nuclide production rates or correction factors are revised in future.
PI name and email:		None None
Data set contact name and email:		John Stone stone@geology.washington.edu
Creation date:		2008-04-08
Last update:		2010-07-09

Results of trying to get these data:		Links partially out of date, but successfully obtained data by following links.
Success?:		YES


Data set title:		Exposure ages of glacial deposits in the Ford Ranges, Marie Byrd Land, West Antarctica
Link:		Link
Description:		This data set consists of exposure ages for glacial deposits and glaciated bedrock surfaces in the Ford Ranges, Marie Byrd Land, West Antarctica. Most samples are glacially transported clasts exposed during the retreat of ice since the last glacial maximum, 10,500 yr B.P. to present. There are a few bedrock samples with longer and more complicated exposure histories. The ages are based on concentrations of the cosmic-ray-produced nuclides Be-10 and Al-26. The primary data are sample locations and exposure ages. Ages are calculated using currently accepted nuclide production rates and correction factors. The data set also contains all details of the chemical and isotopic analyses needed to re-compute exposure ages if nuclide production rates or correction factors are revised in future.
PI name and email:		None None
Data set contact name and email:		John Stone stone@geology.washington.edu
Creation date:		2002-11-21
Last update:		2010-07-09

Results of trying to get these data:		Followed links from entry to obtain data. These data are also published elsewhere.
Success?:		YES


Data set title:		Landform Evolution in the Dry Valleys and its implications for Miocene-Pliocene Climate Change in Antarctica
Link:		Link
Description:		This project seeks to answer a simple question: how old are potholes and related geomorphic features found in the uplands of the McMurdo Dry Valleys, Antarctica? Some research suggests that they are over ten million years old and date the growth of the East Antarctic Ice Sheet, the world's largest. However, some evidence suggests that these are young, erosional features that continuing to evolve to this day. This project uses cosmogenic nuclide dating to determine the age of the pothole floors. The results are important for determining the ice sheet?s history and interpreting the O-isotope record from the marine sediment cores, key records of global climate. Broader impacts include K12 outreach and incorporation of outcomes into university courses.
PI name and email:		Sujoy Mukhopadhyay sujoy@eps.harvard.edu
Data set contact name and email:		Robert Arko info@usap-data.org
Creation date:		2009-03-30
Last update:		2009-04-02

Results of trying to get these data:		Followed links to get a spreadsheet of sample locations. I know that some exposure-age data from these sites have been published, but these are not accessible from this entry.
Success?:		YES


Data set title:		Glacial geology of Northern and Central Victoria Land and Marie Byrd Land
Link:		Link
Description:		Separate regions within the Transantarctic Mountains, the uplifted flank of the West Antarctic rift system, appear to have distinct Neogene histories of glaciation and valley downcutting. Incision of deep glacial outlet valleys occurred at different times throughout central and northern Victoria Land. This is corroborated by measurements of cosmogenic nuclides 21Ne, 10Be and 26Al of glacial erosion surfaces and high-elevated moraines. 21Ne ages of two summit plateaus, at elevations of 1650 m in central Victoria Land and ~2800 m in northern Victoria Land, range from 3.84 to 11.2 Ma, respectively. The latter date indicates that these glacial erosion surfaces are the oldest known exposure dated surfaces on Earth. Glacial erosion terraces, remnants of early phases of valley downcutting, have 21Ne ages of 1.27 and 6.45 Ma for central Victoria Land and northern Victoria Land, respectively. Therefore, deglaciation of summit plateaus, valley downcutting and topographic uplift occurred during the mid Miocene in northern Victoria Land and not earlier than the mid Pliocene in central Victoria Land. In northern Victoria Land ice flow directions changed markedly from the time a regional ice sheet occupied the level of the highest summits to the present condition with summits rising up to 800 above the valley glaciers. In central Victoria Land the oldest documented ice flow direction occupying the summit erosion surface prior to incision was SW-NE, draining the East Antarctic Ice Sheet along an outlet glacier at least ten times as wide as the present E-W flowing David Glacier. This great variation in denudation histories probably results from differential tectonic uplift of various regions within the presently active rift flank. Three tectonic processes contribute to late Neogene uplift, (1) ongoing extension in adjacent Ross Sea rift basins, (2) regional dextral transtension following SE trending Precambrian and Palaeozoic structural trends which offsets the ~N-S trending grain of the rift and reactivates earlier faults, and (3) isostatic response to valley downcutting and related denudation.
PI name and email:		None None
Data set contact name and email:		Anko Lankreijer lana@geo.vu.nl
Creation date:		2001-06-08
Last update:		2007-06-02

Results of trying to get these data:		The only provided URL links to the web page of a commercial consultancy. There is a reference to a single publication that does contain some exposure-age data.
Success?:		YES


Data set title:		Periglacial Landscape Evolution in Antarctic Lava Flows and Glacial Tills
Link:		Link
Description:		This project uses cosmogenic nuclide dating and LIDAR studies of surface roughness to understand weathering and landscape evolution in the Dry Valleys of Antarctica. The work focuses on two processes: cryoturbation of frozen soils and the development of patterned, frozen ground on ancient lava flows. The approach includes innovative uses of He3 profiling. Results will also be applied to understanding the glacial history of the Dry Valleys. There are potential applications to understanding the history of the East Antarctic Ice Sheet and the formation of Martian landscapes. The broader impacts include graduate student education. As well, the work may contribute to our understanding of the history of the Antarctic ice sheets, which is important to modeling their behavior during global climate change.
PI name and email:		Mark Kurz mkurz@whoi.edu
Data set contact name and email:		Robert Arko info@usap-data.org
Creation date:		2009-02-01
Last update:		2009-04-24

Results of trying to get these data:		Followed links to get a list of sample locations.
Success?:		YES


Data set title:		Determination of the Sirius Group (Neogene deposits) mode of deposition at Allan Hills, Mt Feather and Table Mountain
Link:		Link
Description:		An ancient glacial deposit termed the Sirius Group is a collection of Neogene deposits that crop out at high elevations throughout the Transantarctic Mountains (TAM). The paleoflow direction and how the Sirius Group was deposited, whether by valley glacier or continental ice sheet, by wet or dry based glacial ice or by a single depositional event or several overriding events was determined at Allan Hills. This low nunatuk has a mean elevation of around 2000 m above sea level, occupying a low point in the TAM, making the site susceptible to overriding by the East Antarctic Ice Sheet during minor volume fluctuations. The area was geologically mapped in detail. The deposits were studied to interpret the nature of the ice that deposited it by detailed investigations of selected major outcrops including orientation measurements of clasts and deformational features at both measured outcrops and stop locations and deposits were described in terms of texture, clast shape, fabric and composition. Rock and surface samples of several deposits of glacial debris and related features were collected for analysis. The orientation on abraded (striated) and faceted clasts throughout the study area was recorded. Striation direction was measured on lodged boulders in deposits and samples for matrix texture and palynology were taken. Several deposits were surveyed for further striation direction and measuring spot heights of the surface on which the Sirius was deposited, providing data for reconstructing the landscape during the deposition of the Sirius deposit. Surface samples and glacial deposits taken at key locations in Allan Hills and features judges to be much younger were collected for surface age dating of cosmogenic isotope. Glacial deposits near the edge of the Manhaul Glacier were studied in detail with glacial abrasions on bedrock and stone surfaces documented and their orientations measured. Mapping of the southern extent (or distribution) of the deposits in the central Allan Hills was completed using differentially corrected GPS to establish stratigraphic relationships to the Sirius Group. Samples from boulders in the Sirius deposits and more distant deposits were collected for surface age dating of cosmogenic isotopes. Samples were also taken of features judged to be much younger, and from surfaces close to the present ice where fresh glacial striae indicate very recent exposure. A minimum age for the formation and rates of erosion for the area was determined. The study was expanded to Table Mountain (an area similar in elevation to Allan Hills but the deposits are more varied) and Mount Feather (highest elevation deposits of the Sirius Group in the Dry Valleys) to provide a regional perspective. Outcrops were described (stone orientations, linear glacial abrasions, planar deformation structures) and samples were collected for thin sectioning, laboratory analysis, clast orientations, linear glacial abrasions and planar deformational structures.
PI name and email:		Peter Barrett peter.barrett@vuw.ac.nz
Data set contact name and email:		Shulamit Gordon s.gordon@antarcticanz.govt.nz
Creation date:		2009-03-18
Last update:		2009-06-02

Results of trying to get these data:		URL links to a database at VUW that is said to contain information about the rock samples. I didn't look for them in detail. No exposure-age data though.
Success?:		YES


Data set title:		Fieldwork and sampling at Loewe Massif-Amery Oasis
Link:		Link
Description:		At Loewe Massif and Amery Oasis, samples were taken; - for sediment analysis (XRF geochemistry and grain size) - for geochronology (cosmogenic isotope analysis). The custodian for these samples is Dr Damian Gore, Macquarie University. Lake sediment samples were taken from Lake Terrasovoje, Radok Lake and Beaver Lake. The custodian for these lacustrine samples is Dr Martin Melles, Leipzig University. The dataset also includes weather/meteorological observations. Further work in project 1071 was also completed as part of PCMEGA. The fields in this dataset are: Date Site Latitude Longitude Time Altitude Temperature Pressure Wind direction Wind Speed Cloud Relative Humidity
PI name and email:		Damian Gore damian.gore@mq.edu.au
Data set contact name and email:		Data Officer AADC metadata@aad.gov.au
Creation date:		2004-01-16
Last update:		2014-12-11

Results of trying to get these data:		Successfully followed links to lots of field data and photos.
Success?:		YES


Data set title:		Cosmogenic-nuclide measurements, Schmidt, Williams, and Thomas Hills, Pensacola Mountains, Antarctica
Link:		Link
Description:		This data set includes measurements of the concentrations of cosmic-ray-produced nuclides in quartz from surficial glacial deposits in the Schmidt Hills, Williams Hills, and Thomas Hills, which are adjacent to the Foundation Ice Stream in the Pensacola Mountains, Antarctica. It also includes supporting field observations that are necessary to interpret these measurements as surface exposure ages.
PI name and email:		None None
Data set contact name and email:		Greg Balco balcs@bgc.org
Creation date:		2013-12-23
Last update:		2013-12-24

Results of trying to get these data:		Disclosure: I am responsible for this data set. Following the links successfully leads to a large amount of exposure-age data.
Success?:		YES