Beryllium-10 dating of the duration and retreat of the last pinedale glacial sequence

Journal Article · Fri Jun 02 00:00:00 EDT 1995 · Science

DOI:https://doi.org/10.1126/science.268.5215.1329· OSTI ID:93889

Gosse, J C ^[1]; Klein, J ^[2]; Evenson, E B ^[3]

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1. Lehigh Univ., Bethlehem, PA (United States)
2. Univ. of Pennsylvania, Philadelphia, PA (United States)
3. Lehigh Univ., Bethlehem, PA (United States); and others

Accurate terrestrial glacial chronologies are needed for comparison with the marine record to establish the dynamics of global climate change during transitions from glacial to interglacial regimes. Cosmogenic beryllium-10 measurements in the Wind River Range indicate that the last glacial maximum (marine oxygen isotope stage 2) was achieved there by 21,700 {+-} 700 beryllium-10 years and lasted 5900 years. Ages of a sequence of recessional moraines and striated bedrock surfaces show that the initial deglaciation was rapid and that the entire glacial system retreated 33 kilometers to the cirque basin by 12,100 {+-} 500 beryllium-10 years.

• Sponsoring Organization: USDOE
• OSTI ID: 93889
• Journal Information: Science, Journal Name: Science Journal Issue: 5215 Vol. 268; ISSN SCIEAS; ISSN 0036-8075
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AGE ESTIMATION
BERYLLIUM 10
GLACIERS
ISOTOPE DATING
PALEOCLIMATOLOGY
PLEISTOCENE EPOCH
WYOMING