Southern Tie Section: A Stratigraphic Section Through the Devonian-Mississippian Black-Shale Sequence in Ohio, Kentucky, West Virginia, and Virginia.

摘要

The map of the Southern Tie Section is a sequel to the Preliminary Stratigraphic Cross Section of Kepferle, Wilson, and Ettensohn (1978) and uses many of the datum points of that publication. Sample descriptions and other geophysical log curves in addition to the gamma ray (natural radioactivity) curve are used for correlation; and the geology of the substrates of the shale sequence is examined for its relation to that of the sequence itself. The section uses the Base of the Sunbury shale (rather than the base of the shale sequence) as the stratigraphic datum in order better to visualize syndepositional and earlier tectonism which affect the distribution and internal constitution of the sequence. This convention shows elegantly the onlap of the sequence upon the Cincinnati Arch, but does not so readily point out the meaning of the Wildcat Valley Sandstone in the Greendale Syncline at the southeast end of the section. (ERA citation 07:060876)