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Geologic Map of West Virginia. West Virginia's geologic history stretches back into the Precambrian, and includes several periods of mountain building and erosion. At times, much of what is now West Virginia was covered by swamps, marshlands, and shallow seas, accounting for the wide variety of sedimentary rocks found in the state, as well as its wealth of coal and natural gas deposits.
Alluvial fans are common in the geologic record, such as in the Triassic basins of eastern North America and the New Red Sandstone of south Devon. Such fan deposits likely contain the largest accumulations of gravel in the geologic record. Alluvial fans have also been found on Mars and Titan, showing that fluvial processes have occurred on ...
Paleontology in West Virginia refers to paleontological research occurring within or conducted by people from the U.S. state of West Virginia. West Virginia's fossil record begins in the Cambrian . From that time through the rest of the early Paleozoic , the state was at least partially submerged under a shallow sea.
The Prehistory of West Virginia spans ancient times until the arrival of Europeans in the early 17th century. [1] Hunters ventured into West Virginia's mountain valleys and made temporary camp villages since the Archaic period in the Americas .
The first terrace (the modern floodplain) consists simply of Wisconsinan outwash and Holocene alluvial deposits, which fill river valleys that had been cut to bedrock by the end of Illinoian time. [1] I. C. White, the first director of the West Virginia Geological Survey, named this body of water Lake Monongahela (White, 1896).
Karst Subsidence and Linear Features Map of Greenbrier and Monroe Counties, West Virginia by P. Lessing, S.L. Dean, B.R. Kulander & J.H. Renalds, 1979. 32 X 58 inch map. Limestone Outcrops and Probable Areas Underlain by Rock Salt and Natural Brine in West Virginia. 8.5 X 11 inch map. WV Geological Survey County Geologic Reports and Geologic Maps.
There are listings in every one of West Virginia's 55 counties. Listings range from prehistoric sites such as Grave Creek Mound , to Cool Spring Farm in the state's eastern panhandle, one of the state's first homesteads, to relatively newer, yet still historical, residences and commercial districts.
A pediment is not to be confused with a bajada, which is a merged group of alluvial fans. Bajadas also slope gently from an escarpment, but are composed of material eroded from canyons in the escarpment and redeposited on the bajada, rather than of bedrock with a thin veneer of gravel. [6]