Definition
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase
History
Origin
Western Australia, Minnesota
Finland, Europe
Discoverer
Unknown
Jakob Sederholm
Etymology
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
From Finnish Rapakivi which stands for crumbly rock
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock