Newcastle Sandstone | |
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Stratigraphic range: Cretaceous | |
Type | Formation |
Location | |
Region | Wyoming |
Country | United States |
The Newcastle Sandstone is a geologic formation in Wyoming, United States. It preserves fossils dating back to the Late Cretaceous period.
Named as a member of Draneros shale of Colorado group for the town of Newcastle, Weston Co, WY in Powder River basin, where member is conspicuously developed.[1]
Consists of reddish to light-yellow sandstone associated with black, carbonaceous shale. About 35 ft thick in vicinity of Newcastle. A Cretaceous sequence can be formed in the northern Great Plains in Williston and Powder River basins, as well as Chadron arch.
This area is classed as a formation on the westrin rim of the black hills.