Shale

Shale is a fine-grained, clastic sedimentary rock composed of mud that is a mix of flakes of clay minerals and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite. The ratio of clay to other minerals is variable. Shale is characterized by breaks along thin laminae or parallel layering or bedding less than one centimeter in thickness, called fissility. Mudstones, on the other hand, are similar in composition but do not show the fissility.

Read more about ShaleTexture, Composition and Color, Formation

Other articles related to "shale":

Spirit River Formation - Lithology
... grained argillaceous sandstone, dark shale, ironstone, greywacke, shale, siltstone, coal and dark shale with thin sandstone and siltstone stringers ...
Colorado Group - Lithology
... The Colorado Group consists of shale for the most part, and incorporates conglomerate, sandstone and siltstone, and beds of chalk, chalky limestone, coquinas, phosphorite ... Sandstone (below the Second White Speckled Shale), Bowdoin Sandstone and Cardium Sandstone in the non-calcareous shale unit ...
Lamosite
... to brownish black lacustrine-type oil shale, in which the chief organic constituent is lamalginite derived from lacustrine planktonic algae ... Lamosite deposits are the most abundant and largest oil shale deposits beside of marinite deposits ... The largest lacustrine-type oil shale deposits are the Green River Formation in western United States, a number deposits in eastern Queensland, Australia, and the ...
Shale Technologies (company)
... Shale Technologies, LLC is an American privately held oil shale company with the headquarter in Rifle, Colorado ... the proprietary information relating to the Paraho oil shale retorting technologies (Paraho Direct and Paraho Indirect) ...