Definition
Tonalite is a coarse-grained plutonic rock consisting mainly of sodic plagioclase, quartz, and hornblende or other mafic minerals with phaneritic texture
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
History
Origin
Tonale, Italy
Germany
Discoverer
Warren Hamilton
Christian Leopold von Buch
Etymology
From Tonale Pass, northern Italy, + -ite1
From Greek di + base
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock