Definition
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
Scoria is a dark-colored extrusive igneous rock with abundant round bubble-like cavities
History
Origin
Western Australia, Minnesota
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Discoverer
Unknown
Unknown
Etymology
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
From late Middle English (denoting slag from molten metal), from Greek skōria refuse, from skōr dung
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
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Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock