Bibliographic Citation
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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 Date | 1979 Dec 01 |
OSTI Identifier | OSTI ID: 6034849 |
Other Number(s) | CODEN: GLGYB |
Resource Type | Journal Article |
Resource Relation | Geology ; Vol/Issue: 7:12 |
Research Org | Geological Survey, Reston, VA |
Subject | 580201 -- Geophysics-- Seismology & Tectonics-- (1980-1989); ;APPALACHIAN MOUNTAINS-- GEOLOGIC HISTORY;APPALACHIAN MOUNTAINS-- ORIGIN; ATLANTIC OCEAN;CONTINENTAL SHELF;GEOLOGIC STRUCTURES;GEOLOGY;OROGENESIS;PETROGENESIS;SEISMOLOGY |
Related Subject | CONTINENTAL 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 Publication | United States |
Language | English |
Format | Pages: 568-572 |
System Entry Date | 2001 May 13 |
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