Definition
Oil Shale is a fine-grained sedimentary rock from which oil is extracted
Basanite is a black basaltic rock which mainly contains plagioclase, augite, olivine and nepheline and is formerly used as a touchstone
History
Origin
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Discoverer
Unknown
Unknown
Etymology
From Old English scealu in its base sense of thing that divides or separate
From Latin basanites + -ite
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
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Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock