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The AAPG/Datapages Combined Publications Database

GCAGS Transactions

Abstract


Gulf Coast Association of Geological Societies Transactions
Vol. 29 (1979), Pages 179-186

Evidence For Post-Jurassic Tectonism in Eastern North America

Paul J. Roper (1)

ABSTRACT

The Gulf Coastal Plain Province extends eastward along the North American continental margin, and makes up a large portion of the terrain of eastern North America. Both the Gulf Coast and eastern North America have been regarded as a quiescent region since the Jurassic Period because there appears to have been no obvious tectonic activity occurring there, or any reason for it to occur. However, recent investigations, especially in eastern North America, suggest that this view may be too conservative.

Post-Jurassic activity in eastern North America is indicated by widespread faulting, extensive subsidence and uplift which continues to the present, igneous activity, and a regional horizontal compressive stress. It is significant that much of this activity seems to be associated with compressional deformation, vertical uplift, and subsidence. The regional extent of these events is very large, though the magnitude of the diastrophism is less spectacular than in other regions that are generally associated with orogenic activity. Any model that attempts to explain post-Jurassic tectonism in eastern North America must account for these types of activity.


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