Definition
Variolites are a group of dark green basic igneous rocks which exhibit pale colored spots, or spherules, especially on weathered surfaces, that give them a pockmarked appearance
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
History
Origin
France
Western Australia, Minnesota
Discoverer
Unknown
Unknown
Etymology
From Latin varius, speckled, variegated
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Soft Rock
Family
Group
Volcanic
-
Other Categories
Opaque Rock
Coarse Grained Rock, Opaque Rock