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Chemostratigraphy indicates a relatively complete Late Permian to Early Triassic sequence in the Western United States

Matthew R. Saltzman and Alexa R. C. Sedlacek
Chemostratigraphy indicates a relatively complete Late Permian to Early Triassic sequence in the Western United States
Geology (Boulder) (February 2013) 41 (4): 399-402

Abstract

Although the latest Permian mass extinction and associated delta (super 13) C excursion are well documented from the Tethys Ocean, carbonate rocks preserving these events in the eastern Panthalassic Ocean (western Pangea) are unknown. We present delta (super 13) C (sub carb) from the Gerster and Thaynes (Permian and Triassic) Formations in the western United States and document a negative excursion with no evidence for major breaks in continuity. To further constrain the age of the delta (super 13) C (sub carb) excursion in the absence of index fossils, we analyzed the same samples for (super 87) Sr/ (super 86) Sr. When examining our new carbon and Sr data in the context of biostratigraphy and sequence stratigraphy, we conclude that parts of the western United States may preserve carbonate successions that span the latest Permian extinction.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 41
Serial Issue: 4
Title: Chemostratigraphy indicates a relatively complete Late Permian to Early Triassic sequence in the Western United States
Affiliation: Ohio State University, School of Earth Sciences, Columbus, OH, United States
Pages: 399-402
Published: 20130207
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 36
Accession Number: 2013-023702
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2013110
Illustration Description: illus.
N35°00'00" - N42°00'00", W120°00'00" - W114°04'60"
N37°00'00" - N42°00'00", W114°04'60" - W109°04'60"
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: 201315
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