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Magnetostratigraphy susceptibility for the Guadalupian series GSSPs (Middle Permian) in Guadalupe Mountains National Park and adjacent areas in West Texas

By
Brooks B. Ellwood
Brooks B. Ellwood
Department of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803, USA
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Lance L. Lambert
Lance L. Lambert
Department of Geological Sciences, University of Texas at San Antonio, San Antonio, TX 78249, USA
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Jonathan H. Tomkin
Jonathan H. Tomkin
School of Earth, Society, and Environment, University of Illinois, 428 Natural History Building, 1301 W. Green Street, Urbana, IL 61801, USA
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Gorden L. Bell
Gorden L. Bell
Great Basin National Park, Baker, NV 89311, USA
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Merlynd K. Nestell
Merlynd K. Nestell
Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, TX 76019–0049, USA
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Galina P. Nestell
Galina P. Nestell
Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, TX 76019–0049, USA
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Bruce R. Wardlaw
Bruce R. Wardlaw
United States Geological Survey, Reston, VA 20192, USA
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Published:
January 01, 2013

Abstract

Here we establish a magnetostratigraphy susceptibility zonation for the three Middle Permian Global boundary Stratotype Sections and Points (GSSPs) that have recently been defined, located in Guadalupe Mountains National Park, West Texas, USA. These GSSPs, all within the Middle Permian Guadalupian Series, define (1) the base of the Roadian Stage (base of the Guadalupian Series), (2) the base of the Wordian Stage and (3) the base of the Capitanian Stage. Data from two additional stratigraphic successions in the region, equivalent in age to the Kungurian–Roadian and Wordian–Capitanian boundary intervals, are also reported. Based on low-field, mass specific magnetic susceptibility (χ) measurements of 706 closely spaced samples from these stratigraphic sections and time-series analysis of one of these sections, we (1) define the magnetostratigraphy susceptibility zonation for the three Guadalupian Series Global boundary Stratotype Sections and Points; (2) demonstrate that χ datasets provide a proxy for climate cyclicity; (3) give quantitative estimates of the time it took for some of these sediments to accumulate; (4) give the rates at which sediments were accumulated; (5) allow more precise correlation to equivalent sections in the region; (6) identify anomalous stratigraphic horizons; and (7) give estimates for timing and duration of geological events within sections.

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Contents

Geological Society, London, Special Publications

Magnetic Methods and the Timing of Geological Processes

L. Jovane
L. Jovane
Universidade de Saão Paulo, Brazil
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E. Herrero-Bervera
E. Herrero-Bervera
University of Hawaii at Manoa, USA
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L.A. Hinnov
L.A. Hinnov
Johns Hopkins University, USA
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B. Housen
B. Housen
Western Washington University, USA
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Geological Society of London
Volume
373
ISBN electronic:
9781862396364
Publication date:
January 01, 2013

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