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GEOREF RECORD

Clay mineralogy of pluvial lake sediments, southern High Plains, Texas

W. T. Parry and C. C. Reeves
Clay mineralogy of pluvial lake sediments, southern High Plains, Texas
Journal of Sedimentary Petrology (June 1968) 38 (2): 516-529

Abstract

Lacustrine sediments from six pluvial lake basins of the southern High Plains, Texas, contain illite, montmorillonite, interstratified illite-montmorillonite, kaolinite, glauconitic mica, and in two basins, sepiolite. Sepiolite, illite-montmorillonite, and glauconitic mica are authigenic; some of the montmorillonite is derived from volcanic ash, but most of the lacustrine clay is detrital and representative of ancient soils of the Llano Estacado. Increase in kaolinite and montmorillonite with depth and corresponding decrease in illite is indicative of a Pleistocene pluvial period antedating Tahoka Clay time (14,000 to 22,000 years B.P.). Lacustrine strata of post-Tahoka age, formed in a closed lake environment, consist of illite, illite-montmorillonite, montmorillonite, sepiolite with gypsum, sodium sulfate, glauconitic mica, and dolomite.


ISSN: 0022-4472
Coden: JSEPAK
Serial Title: Journal of Sedimentary Petrology
Serial Volume: 38
Serial Issue: 2
Title: Clay mineralogy of pluvial lake sediments, southern High Plains, Texas
Pages: 516-529
Published: 196806
Text Language: English
Publisher: Society of Economic Paleontologists and Mineralogists, Tulsa, OK, United States
Accession Number: 1968-054836
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus., table
N29°00'00" - N56°00'00", W115°00'00" - W97°00'00"
N25°45'00" - N36°30'00", W106°30'00" - W93°30'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1968
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