The Ames Limestone is a geologic formation in Ohio, Kentucky, Pennsylvania and West Virginia. It is part of the Conemaugh Group. Formerly know at "Crinoidal Limestone" and "Green Fossiliferous Lime" it was renamed to Ames.[1]

Ames Limestone
Stratigraphic range: Carboniferous
~303.7 Ma
Fossiliferous Ames Limestone (Morgan County, Ohio)
TypeMember
Unit ofConewango Group
Sub-unitsNone
Thickness1 - 4'
Lithology
PrimaryLimestone
Location
Region Ohio,  Pennsylvania,  West Virginia
Country United States
Type section
Named forAmesville, Ohio

Fossils of Echinoderm, Brachiopod, and Gastropoda are commonly found in the Ames.[2]

Description

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The Ames is a thin Marker bed of Limestone and/or Fossiliferous limestone. It marks a transition from a predominantly marine environment to predominantly alluvial environment. The Ames serves as a marker for the boundary for the Casselman Formation and the Glenshaw Formation. [2]

References

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  1. ^ "Geolex — Ames publications". ngmdb.usgs.gov. Retrieved 2023-09-07.
  2. ^ a b "Sedimentation in Western Pennsylvania". University of Pittsburgh. September 2023.