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GEOREF RECORD

Diapiric origin of the Blytheville and Pascola arches in the Reelfoot Rift, east-central United States; relation to New Madrid seismicity

F. A. McKeown, R. M. Hamilton, S. F. Diehl and Ernest E. Glick
Diapiric origin of the Blytheville and Pascola arches in the Reelfoot Rift, east-central United States; relation to New Madrid seismicity
Geology (Boulder) (November 1990) 18 (11): 1158-1162

Abstract

Most of the earthquakes in the New Madrid seismic zone correlate spatially with the Blytheville Arch and part of the Pascola Arch, which are interpreted to be the same structure. Both arches may have formed by diapirism along the axis of the Reelfoot Rift. Seismic, geophysical, and drill-hole data indicate that the rocks in the arches are highly deformed and fractured and have gross lithologic properties that make them weaker than rocks adjacent to the arches. The weaker rocks are inferred to fail more readily than the stronger rocks adjacent to the arches.--Modified journal abstract.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 18
Serial Issue: 11
Title: Diapiric origin of the Blytheville and Pascola arches in the Reelfoot Rift, east-central United States; relation to New Madrid seismicity
Affiliation: U. S. Geol. Surv., Denver, CO, United States
Pages: 1158-1162
Published: 199011
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 25
Accession Number: 1990-058292
Categories: SeismologyStructural geologyEngineering geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch maps
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1990
Program Name: USGSOPNon-USGS publications with USGS authors
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