Definition
Limestone is a sedimentary rock composed mostly of calcite and aragonite, which are different crystal forms of calcium carbonate
Oil Shale is a fine-grained sedimentary rock from which oil is extracted
History
Origin
New Zealand
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Discoverer
Belsazar Hacquet
Unknown
Etymology
From lime and stone in late 14th Century
From Old English scealu in its base sense of thing that divides or separate
Class
Sedimentary Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
Family
Group
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Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock