Lamosite is an olive-gray brown or dark gray to brownish black lacustrine-type oil shale, in which the chief organic constituent is lamalginite derived from lacustrine planktonic algae.
In minor scale it also consists of vitrinite, inertinite, telalginite, and bitumen.
[1] 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 New Brunswick Albert Formation and several other deposits in Canada.
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