1 Definition
1.1 Definition
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
Ijolite is an intrusive igneous rock which is composed mainly of nepheline and an alkali pyroxene, usually aegirine-augite
1.2 History
1.2.1 Origin
Western Australia, Minnesota
Finland, Europe
1.2.2 Discoverer
1.3 Etymology
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
From the first syllable of the Finnish words Ii-vaara, Iijoki, &c. commonly used geographical names in Finland, and the Gr. Xiflos, a stone
1.4 Class
Sedimentary Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
1.6 Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock