Geology and water resources of the Bighorn Basin, Wyoming . mestones and conglomerates have a thickness of about 200 feet andare sometimes capped by a layer of white sandstone, which is regarded as the base ofthe Bighorn formation. Fossils have been observed at various horizons, chiefly in the limestones a shortdistance above the middle of the formation, in the sandstones next below, and in thebasal sandstones. The prominent forms are Dicellomus politus and Ptychopariaowenia, the latter occurring mainly in the basal sandstone. AhsaroJca Mountain region.—In Shoshone Canyon on the western side o
Geology and water resources of the Bighorn Basin, Wyoming . mestones and conglomerates have a thickness of about 200 feet andare sometimes capped by a layer of white sandstone, which is regarded as the base ofthe Bighorn formation. Fossils have been observed at various horizons, chiefly in the limestones a shortdistance above the middle of the formation, in the sandstones next below, and in thebasal sandstones. The prominent forms are Dicellomus politus and Ptychopariaowenia, the latter occurring mainly in the basal sandstone. AhsaroJca Mountain region.—In Shoshone Canyon on the western side of thedistrict the entire succession of beds comprising the Deadwood formation is limits of the formation here are well defined, but the thickness is somewhatdiminished. At the top there is a thin-bedded limestone alternating with layers ofgreen shale and flat-pebble conglomerate; below this occur sandstone and shale in S. GEOLOGICAL SURVEY PROFESSIONAL PAPER NO. 63 PL. Formation General Character East side West side Dark shale with 1100-1200. Cherty fine shale and sandston 1 r 230150 Soft white limestone, thin , massive, buff limestone withsilica 5treal<s.
Size: 1757px × 1422px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubj, booksubjectwatersupply
