Abstract
ENSO-like cyclicity in full-glacial (MIS-2) lake varves from the Wind River Range of Wyoming
Abstracts with programs - Geological Society of America, Vol.45(7), p.259
Geological Society of America, 2013 annual meeting & exposition
2013
Abstract
Varved sediments from two moraine-dammed lakes in the Wind River Range of Wyoming were analyzed for evidence of precipitation variability for more than 10,000 years of the full-to-late-glacial MIS-2 period. Spectral analysis of varve thicknesses in cores taken from Louis and Fiddlers lakes spanning the periods from approximately 25,000 to approximately 14,300 calendar years and from approximately 18,500 to approximately 15,500 calendar years BP, respectively, exhibit distinct interannual 2.3-to-3.1-year periodicity that indicates ENSO-like influence on the precipitation patterns of this region of the North American interior during the Last Glacial Maximum. Peaks in the power spectra are found for similar frequencies in both lakes, but differences in the respective catchment areas of the lakes affect details of sediment deposition and associated varve thicknesses. Our data provide the first evidence of the presence of ENSO-like forcing of precipitation-derived sedimentation patterns during the last full-glacial period into the interior of North America and may suggest a teleconnection to the late-glacial ENSO-like patterns previously reported from Lake Huron and New England.
Details
- Title: Subtitle
- ENSO-like cyclicity in full-glacial (MIS-2) lake varves from the Wind River Range of Wyoming
- Creators
- Dennis Dahms - University of Northern IowaM. E MannAnders NorenTyler JohnsonChristoph E GeissJeffrey A Dorale
- Resource Type
- Abstract
- Publication Details
- Abstracts with programs - Geological Society of America, Vol.45(7), p.259
- Conference
- Geological Society of America, 2013 annual meeting & exposition
- Publisher
- Geological Society of America (GSA)
- ISSN
- 0016-7592
- Alternative title
- Geological Society of America, 2013 annual meeting & exposition
- Language
- English
- Date published
- 2013
- Academic Unit
- Earth and Environmental Sciences
- Record Identifier
- 9984240904502771
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