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Mesaverde Formation : ウィキペディア英語版 | Mesaverde Formation
The Mesaverde Formation is a Late Cretaceous geologic formation found in areas of Colorado, New Mexico, Utah, and Wyoming, in the Western United States. ==Geology== The formation is described by W.G. Pierce as interbedded light gray sandstone and gray shale in the upper part; massive, light-buff, ledge-forming sandstone containing thin lenticular coal beds in the lower part.〔Pierce, W.G., 1997, Geologic map of the Cody 1 degree x 2 degrees quadrangle, northwestern Wyoming: U.S. Geological Survey, Miscellaneous Geologic Investigations Map I-2500, scale 1:250000.〕 The formation occurs in various structural basins in the Western United States such as the Piceance Basin, Powder River Basin, Uintah Basin, Washakie Basin, and the Wind River Basin.
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