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Chilhowee formation : ウィキペディア英語版 | Chilhowee formation
The Chilhowee Group is a sedimentary body composed of early Cambrian siliciclastic sedimentary rocks which crop out along the eastern margin of the Blue Ridge province in Maryland and Virginia. They represent a rift to passive margin sequence, with mostly coarse, feldspathic sandstones and conglomerates in the lower member and shales and phyllite in the upper members.The Chilhowee Group contains three main formations; the Weverton, Harpers (Hampton) and Antietam (Erwin).
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