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Extent and Formation of Deeply Buried Channels on the Continental Shelf off Southern New England
Robert L. McMaster and Asaf Ashraf
The Journal of Geology
Vol. 81, No. 3 (May, 1973), pp. 374-379
Published by: The University of Chicago Press
Stable URL: http://www.jstor.org/stable/30084831
Page Count: 6
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Seismic reflection profiles reveal a network of deeply buried channels that extends from coastline buried bedrock valleys to some 50 km off Rhode Island. Thalwegs below sea level reach 100-286 m in Coastal Plain deposits. The limited extent, depth, and longitudinal profiles of these channels together with the seaward lobate boundary of the channel pattern suggest severe ice scour modifications of late Tertiary-early Pleistocene preglacial river valleys. Maximum ice advance is correlated with a pre-Woodfordian ice margin of the Wisconsin stage.
The Journal of Geology © 1973 The University of Chicago Press