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  2. Shale - Wikipedia

    en.wikipedia.org/wiki/Shale

    Shales and other mudrocks contain roughly 95 percent of the organic matter in all sedimentary rocks. However, this amounts to less than one percent by mass in an average shale. Black shales, which form in anoxic conditions, contain reduced free carbon along with ferrous iron (Fe 2+) and sulfur (S 2−).

  3. Kettle Point Formation - Wikipedia

    en.wikipedia.org/wiki/Kettle_Point_Formation

    The black shales of the Kettle Point Formation are organic-rich and highly fissile. Some layer of black shale are interlaminated with white-coloured laminae of clay- to silt-sized quartz and calcite grains. The associated greyish green mudstones are homogeneous, lacking discernible lamination or other primary sedimentary structures.

  4. Reedsville Formation - Wikipedia

    en.wikipedia.org/wiki/Reedsville_Formation

    The Reedsville Formation is an olive-gray to dark-gray siltstone, shale, and fine-grained sandstone. [4] In Central Pennsylvania along the Nittany Arch, and extending into the subsurface of northern West Virginia, the base of the Reedsville formation includes the black calcareous Antes Shale formation.

  5. List of rock types - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_types

    Slate – Metamorphic rock - A low grade metamorphic rock formed from shale or silts; Suevite – Rock consisting partly of melted material formed during an impact event – A rock formed by partial melting during a meteorite impact; Talc carbonate – A metamorphosed ultramafic rock with talc as an essential constituent; similar to a serpentinite

  6. Marcellus Formation - Wikipedia

    en.wikipedia.org/wiki/Marcellus_Formation

    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.

  7. Cleveland Shale - Wikipedia

    en.wikipedia.org/wiki/Cleveland_Shale

    The upper part of the Cleveland Shale is a black to brownish black [13] silty shale [9] with occasional thin beds of gray shale and siltstone. [5] The upper part is much richer in petroleum [16] and kerogen. [4] [d] When broken open, fresh samples smell like crude oil. [4]

  8. Burgess Shale - Wikipedia

    en.wikipedia.org/wiki/Burgess_Shale

    The Burgess Shale is a fossil-bearing deposit exposed in the Canadian Rockies of British Columbia, Canada. [ 2 ] [ 3 ] It is famous for the exceptional preservation of the soft parts of its fossils. At 508 million years old ( middle Cambrian ), [ 4 ] it is one of the earliest fossil beds containing soft-part imprints.

  9. Organic-rich sedimentary rocks - Wikipedia

    en.wikipedia.org/wiki/Organic-rich_sedimentary_rocks

    Organic-rich sedimentary rocks are a specific type of sedimentary rock that contains significant amounts (>3%) of organic carbon. [ 1 ] [ 2 ] The most common types include coal , lignite , oil shale , or black shale . [ 2 ]

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