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About: Bertie Formation     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : geo:SpatialThing, within Data Space : dbpedia.org associated with source document(s)

Type: Thinggeo:SpatialThing New Facet based on Instances of this Class

The Bertie Group or Bertie Limestone, also referred to as the Bertie Dolomite and the Bertie Formation, is an upper Silurian (Pridoli, or and age in the local chronologies) geologic group and Lagerstätte in southern Ontario, Canada, and western New York State, United States. Details of the type locality and of stratigraphic nomenclature for this unit as used by the U.S. Geological Survey are available on-line at the National Geologic Map Database. The formation comprises dolomites, limestones and shales and reaches a thickness of 495 feet (151 m) in the subsurface, while in outcrop the group can be 60 feet (18 m) thick.