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torbanite

American  
[tawr-buh-nahyt] / ˈtɔr bəˌnaɪt /

noun

  1. Petrology. a dark-brown oil shale containing a large amount of carbonaceous matter.


Etymology

Origin of torbanite

1855–60; named after Torbane (Hill), in Linlithgowshire, Scotland; -ite 1