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Seaward-dipping reflectors offshore the southeastern United States: seismic evidence for extensive volcanism accompanying sequential formation of the Carolina trough and Blake Plateau basin

Citation

Oh, J and Austin Jr, JA and Phillips, JD and Coffin, MF and Stoffa, PL, Seaward-dipping reflectors offshore the southeastern United States: seismic evidence for extensive volcanism accompanying sequential formation of the Carolina trough and Blake Plateau basin, Geology (Boulder), 23, (1) pp. 9-12. ISSN 0091-7613 (1995) [Refereed Article]


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Copyright Statement

Copyright 1995 Geological Society of America

Official URL: http://dx.doi.org/10.1130/0091-7613(1995)023<0009:...

DOI: doi:10.1130/0091-7613(1995)023<0009:SDROTS>2.3.CO;2

Abstract

Deep-penetration multichannel seismic reflection profiles off the southeastern United States reveal widespread seaward-dipping reflectors (SDRs). Similar features have been imaged and sampled on other North Atlantic rifted margins, where voluminous volcanism has accompanied continental breakup. Beneath the Carolina trough are two sets of SDRs, one along a basement hinge zone and another seaward of the East Coast magnetic anomaly axis. The hinge SDRs lie beneath, and apparently developed prior to, a flood basalt that erupted at 184 3 Ma and is marked by a prominent reflector, J. Beneath the northern Blake Plateau basin, only the hinge SDRs are observed, but they developed after J. We suggest that the inferred north-to-south age difference of SDR emplacement implies a heretofore unrecognized time-transgressive breakup of northwest Africa and North America during the early Middle Jurassic.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Marine Geoscience
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Coffin, MF (Professor Mike Coffin)
ID Code:73866
Year Published:1995
Web of Science® Times Cited:27
Deposited By:Research Division
Deposited On:2011-10-27
Last Modified:2011-11-04
Downloads:1 View Download Statistics

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