Niobrara Formation
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The Niobrara Formation, also called the Niobrara Chalk, is a geologic formation in North America that was deposited between 87 and 82 million years ago during the Coniacian, Santonian, and Campanian s
The Smoky Hill Chalk badlands are in the Niobrara Formation, in Kansas.
Monument Rocks, Smoky Hill Chalk Member of Niobrara formation
Cremnoceramus deformis is an index fossil of the Fort Hays Limestone Member.
Niobrara Chalk was weathered and opalized in the Valentine phase of the Ogallala Formation.
Carlile Shale
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The Carlile Shale is a Turonian age Upper/Late Cretaceous series shale geologic formation in the central-western United States, including in the Great Plains region of Colorado, Kansas, Nebraska, New
Niobrara Formation
…Member consists of somewhat harder, massive limestone beds. The Niobrara Formation is overlain by the marine Pierre Shale and is underlain by the Carlile Shale or Benton Shale. During the time of the deposition of the Niobrara Chalk, much life inhabited the seas of the Western Interior Seaway. By this time in…
1867, bluffs west of Hays, behind the seated soldiers is pre-settlement digging in the Blue Hill Shale, possibly for selenite.
The bare Blue Hill Shale slopes at Yocemento as they appeared in 1873 to Robert Benecke.
Coniasaurus
Ptychodus mammillaris