torbanite


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torbanite

[′tȯr·bə‚nīt]
(geology)
A variety of coal that resembles a carbonaceous shale in outward appearance; it is fine-grained, black to brown, and tough. Also known as bitumenite; kerosine shale.
References in periodicals archive ?
Within this three-fold grouping of oil shales, Hutton (1991) recognized six specific oil-shale types: cannel coal, lamosite, marinite, torbanite, tasmanite, and kukersite.
Torbanite, named after Torbane Hill in Scotland, is a black oil shale whose organic matter is telalginite derived largely from lipid-rich Botryococcus and related algal forms found in fresh- to brackish-water lakes.
The torbanite deposits at Joadja Creek and Glen Davis in New South Wales and the tasmanite deposits in Tasmania were mined for shale oil in the last half of the 1800s and early into the 1900s.
Much of the early production of oil shale was from the torbanite deposits of New South Wales.
Thus, kukersites (and possibly Estonian alum shale as well) are believed to be formed mainly by a massive accumulation of a single type of organisms, analogously to the formation of boghead, torbanite and tasmanites.