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F.B. Meek and F.V. Hayden originated the scientific names for the series of Cretaceous rocks in the central Great Plains of the North American Continent.They gave the name "Benton" to the great shale deposits between the sandstone bluffs at Dakota City, Nebraska, and the chalk bluffs at the junction of the Niobrara and Missouri rivers.
The Greenhorn Limestone or Greenhorn Formation is a geologic formation in the Great Plains Region of the United States, dating to the Cenomanian and Turonian ages of the Late Cretaceous period. The formation gives its name to the Greenhorn cycle of the Western Interior Seaway .
This article contains a list of fossil-bearing stratigraphic units in the state of Nebraska, U.S. Sites ... Greenhorn Formation: Cretaceous: Harrison Formation ...
In the "mile high" plains in the center of the continent, the named layers preserve marine fossils from the Late Cretaceous Period. The term Benton Limestone has also been used to refer to the chalky portions of the strata, especially the beds of the strata presently classified as Greenhorn Limestone, particularly the Fencepost limestone.
Fossil Fighters: Champions; Fossil Fighters: Frontier This page was last edited on 13 May 2023, at 18:02 (UTC). Text is available under the Creative Commons ...
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Colorado is a geologic name applied to certain rocks of Cretaceous age in the North America, particularly in the western Great Plains.. This name was originally applied to classify a group of specific marine formations of shale and chalk known for their importance in Eastern Colorado.