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Regional Relations

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Published:
January 01, 1974

The relations of the Silurian and Lower Devonian rocks of Nova Scotia to those of adjacent portions of the northern Appalachians have, until recently, been uncertain. The pre-Carboniferous grain in coastal Maine and New Brunswick is northeasterly, and in southern Newfoundland it is again roughly northeast, but in the intervening area of northern Nova Scotia (excluding Cape Breton Island) it is almost east-west. Recent work in the northern Appalachians, both published (Berry and Boucot, 1970) and unpublished, helps to resolve this situation. It is also possible to interpret the Paleozoic of the Maritimes in the light of plate tectonics (Mc-Kerrow and Ziegler, 1971). The existing relations fall easily into place if it is assumed that the Silurian and Lower Devonian lithofacies units follow the regional grain; and that the northern Appalachians have a salient (in Nova Scotia) and a recess (in New Brunswick), like many other mountain belts. Once this reconstruction is allowed, the problem of setting up reasonable paleogeographic relations (taking into account both physical and biological environmental factors) becomes relatively simple for Maine, New Brunswick, and Nova Scotia, but the detailed relations of Southern Newfoundland to Nova Scotia are not clear. Figure 24 (Eastport Belt of Figure 24 equals the Coastal Volcanic Belt of Berry and Boucot, 1970) indicates three belts which have consistently distinct facies throughout the Silurian and Lower Devonian. These form the basis for the following discussion.

None of the pre-Silurian rocks of Antigonish and Pictou Counties can be dated well enough to make it. . .

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GSA Special Papers

Geology of the Arisaig Area, Antigonish County, Nova Scotia

A. J. Boucot
A. J. Boucot
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J. F. Dewey
J. F. Dewey
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D. L. Dineley
D. L. Dineley
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R. Fletcher
R. Fletcher
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W. K. Fyson
W. K. Fyson
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J. G. Griffin
J. G. Griffin
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C. F. Hickox
C. F. Hickox
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W. S. McKerrow
W. S. McKerrow
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A. M. Ziegler
A. M. Ziegler
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Geological Society of America
Volume
139
ISBN print:
9780813721392
Publication date:
January 01, 1974

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