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About: Hamilton Group     Goto   Sponge   NotDistinct   Permalink

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

Type: geo:SpatialThingyago:WikicatSilurianGeologicFormationsyago:Abstraction100002137yago:Arrangement107938773yago:Formation108426461yago:Group100031264organisation New Facet based on Instances of this Class

The Hamilton Group is a Devonian-age geological group in the Appalachian region of the United States. It is present in New York, Pennsylvania, Maryland, Ohio, West Virginia, northwestern Virginia and Ontario, Canada. It is mainly composed of marine shale with some sandstone. There are two main formations encompassed by the group: the Mahantango Formation and the Marcellus Shale. In southwestern Virginia, where the two sub-units are not easily distinguishable, the Hamilton Group is broadly equivalent to the Millboro Shale or Millboro Formation. The group is named for the village of Hamilton, New York. These rocks are the oldest strata of the Devonian gas shale sequence.