By Joseph P. Smoot(auth.)

About The Product

Published via the yank Geophysical Union as a part of the Field journey Guidebooks Series.

The Culpeper basin of northern Virginia and adjoining maryland is an elongate, north-northeast-trending half-graben containing a thick series of higher Triassic and reduce Jurassic nonmarine sedimentary and igneous rocks. The basin is centrally positioned in a belt of uncovered early Mesozoic troughs that approximately parallels the dominant Appalachian structural development of the enclosing Precambrian and Paleozoic rocks and extends discontinously from South Carolina to Canada. The basins inside this belt shaped through extensional strategies throughout the preliminary levels of continental fragmentation that finally ended in the outlet of the Atlantic Ocean. a few preexisting thrust faults that motivated the form and distribution of the basins have been it appears reactivated as basic faults in this extensional occasion (Lindholm, 1978; Ratcliffe and Burton, 1985). The sedimentary rocks and basalt flows in those uncovered basins are jointly known as the Newark Supergroup (Froelich and Olsen, 1985). those deposits are intruded by means of a variety of Early Jurassic tholeiitic diabase dikes and sheets that thermally altered the enclosing sedimentary strata.

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