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The Hamilton Group is a Devonian-age geological group which is located in the Appalachian region of the United States.It is present in New York, Pennsylvania, Maryland, Ohio, West Virginia, northwestern Virginia and Ontario, Canada, [1] [2] and is mainly composed of marine shale with some sandstone.
The Marcellus Formation or the Marcellus Shale is a Middle Devonian age unit of sedimentary rock found in eastern North America.Named for a distinctive outcrop near the village of Marcellus, New York, in the United States, [3] it extends throughout much of the Appalachian Basin.
The Mahantango Formation is typically found conformably overlying the Marcellus Formation, and underlying the Tully Limestone (where present). [9] The Mahantango has been divided into four members: [10] Tully Limestone: a fossiliferous calcareous shale. The Tully is a conspicuous formation, which separates the Mahantango from the Hamilton Group ...
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The Marcellus Formation is a vast geological layer of shale spanning Pennsylvania, West Virginia and parts of other states and Ontario, which is named for an outcropping in or near Marcellus. [3] The Town of Marcellus contains a village also named Marcellus. The town and village are southwest of Syracuse. Marcellus Countryside (Rose Hill).
The Marcellus natural gas trend is a large geographic area of prolific shale gas extraction from the Marcellus Shale or Marcellus Formation, of Devonian age, in the eastern United States. [2] The shale play encompasses 104,000 square miles and stretches across Pennsylvania and West Virginia, and into eastern Ohio and western New York. [ 3 ]
Unit E consists of shale, but can include dolomitic shale and dolomite. Anhydrite may also be present within this unit and is also part of the Syracuse. Unit F is the youngest and largest salt in the group, also known as the Syracuse Formation. Where thicker, the F has beds of salt separated by rock grading from shale to dolomite, often with ...