Definition
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock
History
Origin
Western Australia, Minnesota
Germany
Discoverer
Unknown
Van Tooren
Etymology
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
From Greek tephra, ashes from Indo-European base, to burn
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock