By William E. Edmunds, Jane R. Eggleston(auth.)
ISBN-10: 0875906613
ISBN-13: 9780875906614
ISBN-10: 1118667379
ISBN-13: 9781118667378
About The Product
Published via the yank Geophysical Union as a part of the Field journey Guidebooks Series.
within the northern Appalachians, the boundary among the Mississippian and Pennsylvanian platforms falls inside a posh sedimentary series unfold throughout a rapidly-subsiding depositional trough and an adjoining, extra solid craton margin. Sediment resource components lie in a more-or-less non-stop semicircle from southeast to north of the basin. additionally, the higher Mississippian-Lower Pennsylvanian series is interrupted via wide erosion on the topic of epeirogenic upwarping of the zone. Biostratigraphically, the systemic boundary is put on the first incidence of the floral shape Neuropteris pocahontas (D. White) of floral region four as outlined by way of learn and Mamay (1964). besides the fact that, as a result of frequent disconformable nature of the touch, the basal Pennsylvanian vegetation is usually more youthful.
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Extra resources for Characteristics of the Mid-Carboniferous Boundary and Associated Coal-Bearing Rocks in the Appalachian Basin: Morgantown, West Virginia to Chattanooga, Tennessee, July 19-27, 1989
Sample text
S. , July 9-19, 1989. The purpose of this field trip is to examine the thick sequence of Carboniferous strata exposed in the Appalachian basin--the principal coal mining area in the eastern United States. Discussion enroute will emphasize the lithostratigraphy and biostratigraphy of select outcrop sections. An interesting and controversial aspect of Carboniferous stratigraphy in the Appalachian basin is the boundary relationship of the Mississippian and Pennsylvanian Systems. It has been the subject of numerous papers, field trips, and symposia that have featured divergent points of view concerning the position and character of the boundary.
97) and Hoque (1965, p. 254) conclude that the Loyalhanna sand fraction had a northern source, which Edmunds and others (1979) suggested to be the eroding northwest upwarped area and specifically the eroding Burgoon Sandstone. The red units of the Mauch Chunk Formation seem reasonably to be tongues of the red clastics derived from the southeast, considering the continuity and general thickening of the formation to the east. At the same time, it also seems reasonable to suspect that the non-red sand fraction of the Mauch Chunk represents a continuation of the northern sand influx associated with the underlying Loyalhanna.
The Whitwell Shale Member of the Crab Orchard Mountains Formation is about 60 m (200 ft) thick and consists of interbedded shale, siltstone, and finegrained sandstone. Flaser bedding is common in shale and siltstone and thin planar crossbed sets occur in the sandstone which is generally thin bedded and lenticular. 5) coal bed lies approximately 4 to 6 m (15 to 20 ft) above the base of the member. The Kewton Sandstone Member of the Crab Orchard Mountains Formation is mostly feldspathic, fine- to coarsegrained sandstone in beds and crossbed sets less than 1 m (3ft) thick.
Characteristics of the Mid-Carboniferous Boundary and Associated Coal-Bearing Rocks in the Appalachian Basin: Morgantown, West Virginia to Chattanooga, Tennessee, July 19-27, 1989 by William E. Edmunds, Jane R. Eggleston(auth.)
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