Definition
Anthracite is a type of sedimentary rock which is hard and is variety of coal that has high luster
Oil Shale is a fine-grained sedimentary rock from which oil is extracted
History
Origin
Pennsylvania, U.S.
-
Discoverer
Unknown
Unknown
Etymology
From Greek anthrakites, from anthrax, anthrak meaning coal
From Old English scealu in its base sense of thing that divides or separate
Class
Metamorphic Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Soft Rock
Family
Group
-
-
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock