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GEOREF RECORD

Holocene rupture history of the central Teton Fault at Leigh Lake, Grand Teton National Park, Wyoming

Mark S. Zellman, Christopher B. DuRoss, Glenn D. Thackray, Stephen F. Personius, Nadine G. Reitman, Shannon A. Mahan and Cooper C. Brossy
Holocene rupture history of the central Teton Fault at Leigh Lake, Grand Teton National Park, Wyoming
Bulletin of the Seismological Society of America (November 2019) 110 (1): 67-82

Abstract

Prominent scarps on Pinedale glacial surfaces along the eastern base of the Teton Range confirm latest Pleistocene to Holocene surface-faulting earthquakes on the Teton fault, but the timing of these events is only broadly constrained by a single previous paleoseismic study. We excavated two trenches at the Leigh Lake site near the center of the Teton fault to address open questions about earthquake timing and rupture length. Structural and stratigraphic evidence indicates two surface-faulting earthquakes at the site that postdate deglacial sediments dated by radiocarbon and optically stimulated luminescence to approximately 10-11 ka. Earthquake LL2 occurred at approximately 10.0 ka (9.7-10.4 ka; 95% confidence range) and LL1 at approximately 5.9 ka (4.8-7.1 ka; 95%). LL2 predates an earthquake at approximately 8 ka identified in the previous paleoseismic investigation at Granite Canyon. LL1 corresponds to the most recent Granite Canyon earthquake at approximately 4.7-7.9 ka (95% confidence range). Our results are consistent with the previously documented long-elapsed time since the most recent Teton fault rupture and expand the fault's earthquake history into the early Holocene.


ISSN: 0037-1106
EISSN: 1943-3573
Coden: BSSAAP
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 110
Serial Issue: 1
Title: Holocene rupture history of the central Teton Fault at Leigh Lake, Grand Teton National Park, Wyoming
Affiliation: BGC Engineering, Golden, CO, United States
Pages: 67-82
Published: 20191119
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 26
Accession Number: 2020-002476
Categories: SeismologyStructural geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, sketch maps
N43°30'00" - N44°10'00", W110°55'00" - W110°25'00"
Secondary Affiliation: U. S. Geological Survey, USA, United StatesIdaho State University, USA, United StatesUniversity of Colorado Boulder, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202003
Program Name: USGSOPNon-USGS publications with USGS authors
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