Definition
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
Tephrite is an aphanitic to porphyritic textured, volcanic igneous rock
History
Origin
Germany
Germany
Discoverer
Christian Leopold von Buch
Van Tooren
Etymology
From Greek di + base
From Greek tephra, ashes from Indo-European base, to burn
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
Volcanic
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock