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Bad wells, not fracking, spoiling water

Bad wells, not fracking, spoiling water

COLUMBUS, Ohio, Sept. 16 (UPI) --It's bad well design, not hydraulic fracturing itself, that's leading to contamination of drinking water, research led by Ohio State University finds.
Daniel J. Graeber
Marcellus booming, Wood Mackenzie says

Marcellus booming, Wood Mackenzie says

HOUSTON, Aug. 28 (UPI) --The Marcellus shale natural gas play is expected to draw in more than $100 billion in investments from operators, Wood Mackenzie says.
Daniel J. Graeber
Pittsburgh airport housing shale operation

Pittsburgh airport housing shale operation

PITTSBURGH, Aug. 25 (UPI) --Local officials in Pennsylvania say there have been few complaints about hydraulic fracturing operations near Pittsburgh International Airport.
Daniel J. Graeber
Pennsylvania driller fined for gas leak

Pennsylvania driller fined for gas leak

HARRISBURG, Pa., Aug. 20 (UPI) --A state regulator in Pennsylvania said it penalized Cabot Oil & Gas Corp. for losing control of a natural gas well for more than 24 hours in January.
Daniel J. Graeber
Shell makes grab for Marcellus, Utica shale

Shell makes grab for Marcellus, Utica shale

HOUSTON, Aug. 14 (UPI) --Shell said Thursday it was offloading some of its U.S. assets to shift its focus on the Marcellus and emerging Utica shale natural gas reserves in the country.
Daniel J. Graeber
EIA: Utica shale booming

EIA: Utica shale booming

WASHINGTON, Aug. 13 (UPI) --The U.S. Energy Department said it was including the eastern Utica shale formation in a monthly productivity report because of exponential growth in output.
Daniel J. Graeber
Marcellus, Utica help lift Rice Energy

Marcellus, Utica help lift Rice Energy

CANONSBURG, Pa., Aug. 11 (UPI) --Rice Energy, a company focused on eastern U.S. gas basins, said Monday natural gas output from Utica shale is among the highest it has seen so far.
Daniel J. Graeber
Kinder Morgan entities unite in $40 billion acquisition

Kinder Morgan entities unite in $40 billion acquisition

HOUSTON, Aug. 11 (UPI) --Energy company Kinder Morgan Inc. said it was coordinating its affiliate companies under a single roof in a deal valued at more than $40 billion.
Daniel J. Graeber
Criticism, praise erupt over New York shale ruling

Criticism, praise erupt over New York shale ruling

ALBANY, N.Y., July 1 (UPI) --A New York court decision to let cities and towns block hydraulic fracturing is a major blow to the industry, an advocacy group said.
Daniel J. Graeber
Shale offsets many U.S. hurricane issues

Shale offsets many U.S. hurricane issues

WASHINGTON, June 4 (UPI) --Strong growth in onshore U.S. oil and gas production means fewer problems from hurricanes, the analytical arm of the U.S. Energy Department said Wednesday.
Daniel J. Graeber
Cove Point LNG draws mixed reviews

Cove Point LNG draws mixed reviews

WASHINGTON, May 16 (UPI) --Environmental advocacy groups said U.S. regulators need to restart their review process for an export license for liquefied natural gas from Cove Point, Md.
Daniel J. Graeber
Fracking study in Pennsylvania finds few water concerns

Fracking study in Pennsylvania finds few water concerns

HARRISBURG, Pa., April 17 (UPI) -- Water quality in Pennsylvania hasn't been affected by hydraulic fracturing in the state, a report from state's conservation department said.
Daniel J. Graeber
Shale oil, gas production to increase, EIA says

Shale oil, gas production to increase, EIA says

WASHINGTON, April 15 (UPI) -- Oil production and natural gas production from the six prominent shale basins in the United States should increase in May, a U.S. drilling report said.
Daniel J. Graeber
Baker Hughes sees drilling efficiency increase

Baker Hughes sees drilling efficiency increase

HOUSTON, April 11 (UPI) -- Drilling efficiency overall in the United States is 3 percent better than it was at this time last year, Oil services company Baker Hughes said Friday.
Daniel J. Graeber
TransCanada fills U.S. shale gas network

TransCanada fills U.S. shale gas network

April 1 (UPI) -- Canadian pipeline company TransCanada Corp. said it secured nearly 2 billion cubic feet per day worth of commitments for a U.S. shale gas pipeline system.
Daniel J. Graeber
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Wiki

The Marcellus Formation (also classified as the Marcellus Subgroup of the Hamilton Group, Marcellus Member of the Romney Formation, or simply the Marcellus Shale) is a unit of marine sedimentary rock found in eastern North America. Named for a distinctive outcrop near the village of Marcellus, New York in the United States, it extends throughout much of the Appalachian Basin. The shale contains largely untapped natural gas reserves, and its proximity to the high-demand markets along the East Coast of the United States makes it an attractive target for energy development.

Stratigraphically, the Marcellus is the lowest unit of the Devonian age Hamilton Group, and is divided into several sub-units. Although black shale is the dominant lithology, it also contains lighter shales and interbedded limestone layers due to sea level variation during its deposition almost 400 million years ago. The black shale was deposited in relatively deep water devoid of oxygen, and is only sparsely fossiliferous. Most fossils are contained in the limestone members, and the fossil record in these layers provides important paleontologal insights on faunal turnovers. The black shales also contain iron ore that was used in the early economic development of the region, and uranium and pyrite which are environmental hazards. The fissile shales are also easily eroded, presenting additional civil and environmental engineering challenges.

The Marcellus Formation is a black shale that may contain limestone beds and concentrations of iron pyrite (FeS2) and siderite (FeCO3). Its sedimentary structure, or bedding, is moderately well developed. Like most shales, it tends to split easily along the bedding plane, a property known as fissility. Lighter colored shales in the upper portion of the formation tend to split into small thin-edged fragments after exposure. These fragments may have rust stains from exposure of pyrite to air, and tiny gypsum (CaSO4·2H2O) crystals from the reaction between pyrite and limestone particles. Fresh exposures of the pyriteiferous shale may develop the secondary mineralization of orange limonite (FeO(OH)·nH2O), and the pale yellow efflorescence or bloom of sulfur, associated with acid rock drainage.

This article is licensed under the GNU Free Documentation License.
It uses material from the Wikipedia article "Marcellus Shale."
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