Definition
Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds
A sedimentary rock, deposit of a submarine turbidity currents and are composed of layered particles
History
Origin
USA
European Foreland Basins
Discoverer
John Peter Salley
Arnold H. Bouma
Etymology
From the Old English term col, which has meant mineral of fossilized carbon since the 13th century
From Medieval Latin turbiditas, from Latin turbidus (turbid). Turbidity current is from 1939
Class
Sedimentary Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Soft Rock
Family
Group
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Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Opaque Rock