Definition
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture
History
Origin
Western Australia, Minnesota
Tonale, Italy
Discoverer
Unknown
Warren Hamilton
Etymology
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
From Tonale Pass, northern Italy, + -ite1
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, Fine Grained Rock, Medium Grained Rock, Opaque Rock