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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 .
Marcellus natural gas trend. 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 ...
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 . There are two main formations encompassed ...
US shale gas basins, 2011. Shale gas in the United States is an available source of unconventional natural gas.Led by new applications of hydraulic fracturing technology and horizontal drilling, development of new sources of shale gas has offset declines in production from conventional gas reservoirs, and has led to major increases in reserves of U.S. natural gas.
The Marcellus shale, a vast hydrocarbon-bearing formation that spans several states in the Northeast, is widely regarded as the most economical shale gas play in the country. According to Bentek ...
The Chattanooga Shale is a geological formation in Alabama, Arkansas, Georgia, Kentucky, Missouri and Tennessee. It preserves conodont fossils dating to the Devonian period. [1] It occurs mostly as a subsurface geologic formation composed of layers of shale. It is located in East Tennessee and also extends into southeastern Kentucky ...
Mahantango Formation. The Devonian Mahantango Formation is a mapped bedrock unit in Pennsylvania, West Virginia, and Maryland. [1][2][3] It is named for the North branch of the Mahantango Creek in Perry and Juniata counties in Pennsylvania. It is a member of the Hamilton Group, along with the underlying the Marcellus Formation Shale. [4]
386 million years ago. in Late Devonian period. The Taghanic event (Taghanic unconformity, Taghanic crisis or Taghanic onlap) was an extinction event that occurred about 386 million years ago during the Givetian faunal stage of the Middle Devonian geologic period in the Paleozoic era. [1] It was caused by hypoxia from an anoxic event.