Cosmogenic 36Cl and 10Be ages of Quaternary glacial and fluvial deposits of the Wind River Range, Wyoming

Phillips, Fred M.; Zréda, Marek; Gosse, John C.; Klein, J.; Evenson, Edward B.; Hall, Robert D.; Chadwick, Oliver A.; Sharma, Pankaj

doi:10.1130/0016-7606(1997)109<1453:ccabao>2.3.co;2

Cited by 152 publications

(128 citation statements)

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“…Thus, the older or oldest ages on the moraine more closely approximate the age of the moraine. Other workers (Zreda et al, 1994;Phillips et al, 1997) have found similar results. Thus, we favour ages on the older sides of the distributions for any single landform.…”

Section: Geomorphologysupporting

confidence: 76%

Lateglacial and Holocene cosmogenic surface exposure age glacial chronology and geomorphological evidence for the presence of cold‐based glaciers at Nevado Sajama, Bolivia

Smith

Lowell

Caffee

2009

J Quaternary Science

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Section: Geomorphologysupporting

confidence: 76%

Lateglacial and Holocene cosmogenic surface exposure age glacial chronology and geomorphological evidence for the presence of cold‐based glaciers at Nevado Sajama, Bolivia

Smith

Lowell

Caffee

2009

J Quaternary Science

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“…This technique has proven useful in numerous studies of deglacial histories and landform preservation (e.g. Balco et al 2002;Clark et al 2003;Fabel et al 2002;Licciardi et al 2001;Phillips et al 1997;Rinterknecht et al 2006). Unlike the radiocarbon dating technique that gives the age of events following deglaciation (e.g.…”

Section: Samplingmentioning

confidence: 99%

New 10be cosmogenic ages from the vimmerby moraine confirm the timing of scandinavian ice sheet deglaciation in southern sweden

Johnsen

Alexanderson

Fabel

et al. 2009

Geografiska Annaler: Series A, Physical Geography

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. The overall pattern of deglaciation of the southern part of the Scandinavian Ice Sheet has been considered established, although details of the chronology and ice sheet dynamics are less well known. Even less is known for the south Swedish Upland because the area was deglaciated mostly by stagnation. Within this area lies the conspicuous Vimmerby moraine, for which we have used the terrestrial cosmogenic nuclide (10Be) exposure dating technique to derive the exposure age of six glacially transported boulders. The six 10Be cosmogenic ages are internally consistent, ranging from 14.9 ± 1.5 to 12.4 ± 1.3 ka with a mean of 13.6 ±0.9 ka. Adjusting for the effects of surface erosion, snow burial and glacio‐isostatic rebound causes the mean age to increase only by c. 6% to c. 14.4± 0.9 ka. The 10Be derived age for the Vimmerby moraine is in agreement with previous estimates forthe timing of deglaciation based on radiocarbon dating and varve chronology. This result shows promise for further terrestrial cosmogenic nuclide exposure studies in southern Sweden.

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“…All ages were calculated using a bulk density of 2.7 g/cm 3 and a neutron attenuation coefficient of 170 g cm À2 . The analytical error for 36 Cl ages is assumed to be p8% of the age (Phillips et al, 1997). The 8% value is probably an overestimate of analytical error in this study; therefore, we arbitrarily assigned an error of 5% to all 36 Cl age estimates.…”

Section: Article In Pressmentioning

confidence: 99%

New data for Late Pleistocene Pinedale alpine glaciation from southwestern Colorado

Benson

Madole

Landis

et al. 2005

Quaternary Science Reviews

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New cosmogenic surface-exposure ages of moraine-crest boulders from southwestern Colorado are compared with published surface-exposure ages of boulders from moraine complexes in north-central Colorado and in west-central (Fremont Lake basin) Wyoming.10 Be data sets from the three areas were scaled to a single 10 Be production rate of 5.4 at/g/yr at sea level and high latitude (SLHL), which represents the average 10 Be production rate for two high-altitude, mid-latitude sites in the western United States (US) and Austria. Multiple nuclide ages on single boulders indicate that this 10 Be production rate yields ages comparable to those calculated with a commonly used 36 Cl production scheme. The average age and age range of moraine-crest boulders on terminal moraines at the southwestern Colorado and Wyoming sites are similar, indicating a retreat from their positions $16.8 36 Cl ka (Cosmogenic ages in this paper are labeled 10 Be or 36 Cl ka or just ka when both 10 Be or 36 Cl ages are being discussed; radiocarbon ages are labeled 14 C ka, calibrated radiocarbon are labeled cal ka, and calendar ages are labeled calendar ka. Errors (71s) associated with ages are shown in tables. Radiocarbon ages were calibrated using the data of Hughen et al. (Science 303 (2004) 202). This suggests a near-synchronous retreat of Pinedale glaciers across a 470-km latitudinal range in the Middle and Southern Rocky Mountains. Hypothetical corrections for snow shielding and rock-surface erosion shifts the time of retreat to between 17.2 and 17.5 10 Be ka at Pinedale, Wyoming, and between 16.3 and 17.3 36 Cl ka at Hogback Mountain, Colorado.

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Cosmogenic 36Cl and 10Be ages of Quaternary glacial and fluvial deposits of the Wind River Range, Wyoming

Cited by 152 publications

References 0 publications

Lateglacial and Holocene cosmogenic surface exposure age glacial chronology and geomorphological evidence for the presence of cold‐based glaciers at Nevado Sajama, Bolivia

Lateglacial and Holocene cosmogenic surface exposure age glacial chronology and geomorphological evidence for the presence of cold‐based glaciers at Nevado Sajama, Bolivia

New 10be cosmogenic ages from the vimmerby moraine confirm the timing of scandinavian ice sheet deglaciation in southern sweden

New data for Late Pleistocene Pinedale alpine glaciation from southwestern Colorado

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