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Early Tertiary paleogeologic map of the northern Sierra Nevada Batholith and the northwestern Basin and Range

Nicholas J. Van Buer, Elizabeth L. Miller and Trevor A. Dumitru
Early Tertiary paleogeologic map of the northern Sierra Nevada Batholith and the northwestern Basin and Range
Geology (Boulder) (April 2009) 37 (4): 371-374

Abstract

The northern Sierra Nevada and adjacent Basin and Range, western United States, are marked by a widespread regional unconformity at the base of the Eocene-Miocene volcanic and sedimentary section that overlies the Mesozoic batholith and its wall rocks. To help address controversial questions about the origin, uplift, and erosion of the batholith, we compiled a subcrop geologic map of the unconformity prior to Tertiary extension. This simple but under-utilized technique reveals the distribution of rock units that could have contributed detritus to the Eocene-Miocene river channels crossing the Sierra Nevada and demonstrates that the Mesozoic Sierra Nevada batholith was continuous to the northeast across the northwestern Basin and Range. More speculatively, the subcrop map implies that Late Cretaceous-Eocene erosional stripping may have been greatest above the axis of the batholith and decreased to the east; thus, drainage in this area may have been eastward and then switched westward in Eocene-Miocene time.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 37
Serial Issue: 4
Title: Early Tertiary paleogeologic map of the northern Sierra Nevada Batholith and the northwestern Basin and Range
Affiliation: Stanford University, Department of Geological and Environmental Sciences, Stanford, CA, United States
Pages: 371-374
Published: 200904
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 33
Accession Number: 2009-041057
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: sect., geol. sketch map
N38°00'00" - N42°00'00", W121°00'00" - W116°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, 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: 200922
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