The Burket Shale or Geneseo Shale is the lowest member of the Harrell Shale/ Genessee Group. The Burket is an organic-rich black shale that rests just above the Tully Limestone member of the Mahantango Formation. The geographical extent of the formation includes southern

New York New York most commonly refers to: * New York (state), a state in the northeastern United States * New York City, the most populous city in the United States, located in the state of New York New York may also refer to: Places United Kingdom * ...

Pennsylvania Pennsylvania, officially the Commonwealth of Pennsylvania, is a U.S. state, state spanning the Mid-Atlantic (United States), Mid-Atlantic, Northeastern United States, Northeastern, Appalachian, and Great Lakes region, Great Lakes regions o ...

, eastern

Ohio Ohio ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the ...

, and

West Virginia West Virginia is a mountainous U.S. state, state in the Southern United States, Southern and Mid-Atlantic (United States), Mid-Atlantic regions of the United States.The United States Census Bureau, Census Bureau and the Association of American ...

. The Burket is also known as the Geneseo in New York and parts of Northern Pennsylvania. In 1918 the Burket and Harrell were described by Charles Butts, from outcrops located in Blair County, located in southwestern Pennsylvania.Butts, Charles, 1918, Geologic section of Blair and Huntingdon Counties, central Pennsylvania:

American Journal of Science The ''American Journal of Science'' (''AJS'') is the United States of America's longest-running scientific journal, having been published continuously since its conception in 1818 by Professor Benjamin Silliman, who edited and financed it himself ...

, 4th series, v. 46, p. 523-537. In 1920, C. H. Chadwick described the Genesee and Geneseo formations in New York. The usage of the different names is just a matter of personal preference.

Description

This organic shale is blackish gray, it may also have an olive, brown or grayish. Subsurface the bedding is massive. Where fracturing occurs

Pyrite The mineral pyrite ( ), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Fe S2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral. Pyrite's metallic luster and pale brass-yellow hue ...

and

Calcite Calcite is a Carbonate minerals, carbonate mineral and the most stable Polymorphism (materials science), polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on ...

may fill the fractures.

References

{{portal bar, Devonian Shale formations of the United States Devonian System of North America Devonian Pennsylvania Devonian Ohio Devonian West Virginia Geological members