Definition
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs
History
Origin
Western Australia, Minnesota
Adak, Aleutian Islands
Discoverer
Unknown
Defant and Drummond
Etymology
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
From Adak, Aleutian Islands
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock