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Title Sequential development of the Appalachian orogen above a master decollement: a hypothesis
Creator/Author Harris, L.D. ; Bayer, K.C.
Publication Date1979 Dec 01
OSTI IdentifierOSTI ID: 6034849
Other Number(s)CODEN: GLGYB
Resource TypeJournal Article
Resource RelationGeology ; Vol/Issue: 7:12
Research OrgGeological Survey, Reston, VA
Subject580201 -- Geophysics-- Seismology & Tectonics-- (1980-1989); ;APPALACHIAN MOUNTAINS-- GEOLOGIC HISTORY;APPALACHIAN MOUNTAINS-- ORIGIN; ATLANTIC OCEAN;CONTINENTAL SHELF;GEOLOGIC STRUCTURES;GEOLOGY;OROGENESIS;PETROGENESIS;SEISMOLOGY
Related SubjectCONTINENTAL MARGIN;MOUNTAINS;SEAS;SURFACE WATERS
Description/Abstract Surface geology and seismic-reflection data suggest that rather than having a massive rooted central core the southern part of the Appalachian orogen from the Appalachian Plateau to the Atlantic continental shelf is underlain by an eastward-dipping decollement zone.^We infer that this decollement zone was a long-lived structural element, intermittently growing from east to west during late Proterozoic to late Paleozoic time.^Onshore displacement along the detachment surface was episodic through this long period of time, so that reliable estimates of total shortening for the entire orogen are not possible.^Palinspastic restoration of only the western margin of the orogen, the area west of the Brevard Zone, suggests a minimum of 280 km (175 mi) of Alleghenian displacement.^Total accumulated shortening through time within the entire orogen must be considerably greater, probably exceeding hundreds of additional kilometres.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 568-572
System Entry Date2001 May 13

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