Download E-books Tectonic, Depositional, and Pleoecological History of Early Mesozoic Rift Basins, Eastern North America: Gulf, North Carolina, USA to Parrsboro, Nova ... 1989, Volume T351 (Field Trip Guidebooks) PDF

By Paul E. Olsen, Pamela J. W. Gore

Published through the yankee Geophysical Union as a part of the sector journey Guidebooks sequence, quantity 351.

Eastern North the US comprises the vintage Atlantic-type passive continental margin shaped by means of the breakup of the supercontinent of Pangaea. The Triassic initiation of the breakup used to be marked by way of the formation of rifted crust all alongside the axis of the longer term Atlantic, from Greenland to Mexico. In jap North the US, 9 significant rift basins, commonly half-graben, and a number of other minor basins are uncovered from Nova Scotia to South Carolina, with many extra buried under the coastal simple and continental shelf (Figure 1.1). The uncovered rift basins, which heavily stick to the fad of the Appalachian orogen, jam-packed with hundreds of thousands of meters of continental sediments and basalt flows over a interval of roughly forty five million years. Diabase plutons and dikes, it appears coeval with the basalt flows, largely intruded and metamorphosed pre-existing strata. The faulted, tilted, and eroded rift strata are termed the Newark Supergroup (Van Houten, 1977; Olsen, 1978; Froelich and Olsen, 1984).

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