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Book Chapter

Problems for Future Consideration

Published:
January 01, 1983

Abstract

Although the subsurface information provided by the COCORP reflection data place strong constraints on the crustal structure and evolution of the southern Appalachians, numerous questions remain. It is the purpose of this section to outline some of the fundamental problems which may help to further enhance the understanding of the structural development in the Appalachians. Some examples include:

  1. What is the nature of the reflecting boundaries in the middle crust east of the Inner Piedmont? Are they basinal facies (meta-) sediments which stratigraphically correlate with the layers beneath the Inner Piedmont, or are they unrelated? This question is critical to determining whether the thrusts extend east of the Inner Piedmont, and thus to beneath the present Atlantic shelf.

  2. How do the reflectors beneath the Blue Ridge, Inner Piedmont, Eastern Piedmont, and Coastal Plain vary along strike? Do they vary in thickness and metamorphic grade significantly? Do the faults such as the Brevard and Augusta faults vary in dip along strike?

  3. Are the Precambrian (Grenville) units in the Blue Ridge and Piedmont all underlain by layered reflectors (presumably sediments), and thus allochthonous; or, are some of them autochthonous and thus true fensters through an overlying thrust sheet? Seismic data across the Grandfather Mountain window (Harris and Bayer, 1979a; Harris et al, 1981) and the Green Mountains (Ando et al, in press) can be interpreted to indicate emplacement of the Precambrian (Grenville) rocks along thrust faults, and thus imply they are allochthonous. A particularly important area is the Pine Mountain belt

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Contents

AAPG Studies in Geology

The Cocorp Seismic Reflection Traverse Across the Southern Appalachians

Frederick A. Cook
Frederick A. Cook
1
Department of Geology and Geophysics University of Calgary Calgary, Alberta T2N 1N4
Department of Geological Sciences Cornell University Ithaca, New York 14853
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Larry D. Brown
Larry D. Brown
Department of Geological Sciences Cornell University Ithaca, New York 14853
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Sidney Kaufman
Sidney Kaufman
Department of Geological Sciences Cornell University Ithaca, New York 14853
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Jack E. Oliver
Jack E. Oliver
Department of Geological Sciences Cornell University Ithaca, New York 14853
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American Association of Petroleum Geologists
Volume
14
ISBN electronic:
9781629811666
Publication date:
January 01, 1983

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