Definition
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
History
Origin
Germany
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Discoverer
Christian Leopold von Buch
Alexandre Brongniart and René Just Haüy
Etymology
From Greek di + base
From Greek trakhus rough’ or trakhutēs roughness
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
Volcanic
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock