BLACK SHALE

Domain	Definition
Mining	A. A dark, thinly laminated carbonaceous shale, exceptionally rich in organic matter (5% or more carbon content) and sulfide (esp. iron sulfide, usually pyrite), and often containing unusual concentrations of certain trace elements (U, V, Cu, Ni). It is formed by partial anaerobic decay of buried organic matter in a quiet-water, reducing environment (such as in a stagnant marine basin) characterized by restricted circulation and very slow deposition of clastic material. Fossil organisms are preserved as a graphitic or carbonaceous film or as pyrite replacements. Syn:biopelite b. Usually a very thin-bedded shale, rich in sulfides (esp. pyrite, which may have replaced fossils) and rich in organic material, deposited under barred basin conditions causing anaerobic accumulation c. Generally, a fine-grained, finely laminated carbonaceous shale, sometimes canneloid, often found as a roof to a coal, or in place of acoal, resting on a fire clay. Syn:black metal. (references)
Source: compiled by the editor from various references; see credits.

Frequency of Internet Keywords: BLACK SHALE

Anagrams: BLACK SHALE

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "a-a-b-c-e-h-k-l-l-s"
	-1 letter: shellback.
	-2 letters: backlash, bechalks, cashable, scalable, shakable, shellack, slakable.
	-3 letters: bechalk, challas, hackles, keblahs, salable, shackle, shellac.
	-4 letters: akelas, baches, blacks, bleach, bleaks, cabals, cables, calash, calesa, callas, casbah, chalks, challa, chelas, haceks, hackle, kasbah, keblah, labels, laches.
	-5 letters: aback, abase, abash, ables, aches, akela, alack, albas, alecs, baals, backs, bakes, balas, bales, balks, balls.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.