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High-resolution chemostratigraphic record of late Pleistocene lake-level variability, Mono Lake, California

Susan R. H. Zimmerman, Sidney R. Hemming, N. Gary Hemming, Paul B. Tomascak and Crystal Pearl
High-resolution chemostratigraphic record of late Pleistocene lake-level variability, Mono Lake, California
Geological Society of America Bulletin (November 2011) 123 (11-12): 2320-2334

Abstract

The study of abrupt changes in global climate requires high-resolution records for which the connection to the climate system is well understood. Because lake systems are by their nature unique, ground truthing of geochemical measurements against directly observable physical evidence is required. The Mono Lake basin exposes multiple outcrops of lake sediments deposited during the last glacial period, providing the opportunity to reconstruct lake-level changes through stratigraphy-based interpretation of high-resolution records. Here we present a record of bulk-sediment carbonate derived from overlapping sections in three outcrops around the Mono Lake basin. We interpret this record as a reflection of lake-level variation, based on well-exposed stratigraphy and sedimentary facies changes. The co-variation of lake level with Sr isotopes measured in ostracodes is interpreted to reflect increased proportion of water supplied from the eastern basin during wet times. This high carbonate/high lake-level relationship is the opposite of the high carbonate/low lake-level relationship inferred in nearby Owens Lake, a difference attributable to extreme differences in basin geometry affecting the frequency of spilling conditions and resultant lake chemistry.


ISSN: 0016-7606
EISSN: 1943-2674
Coden: BUGMAF
Serial Title: Geological Society of America Bulletin
Serial Volume: 123
Serial Issue: 11-12
Title: High-resolution chemostratigraphic record of late Pleistocene lake-level variability, Mono Lake, California
Affiliation: Lamont-Doherty Earth Observatory, Palisades, NY, United States
Pages: 2320-2334
Published: 201111
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 65
Accession Number: 2011-097651
Categories: Quaternary geologyIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2011267
Illustration Description: illus. incl. 1 table, geol. sketch map
N37°55'00" - N38°07'00", W119°10'00" - W118°52'60"
Secondary Affiliation: City University of New York, Queens College, USA, United StatesState University of New York at Oswego, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201150
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