Definition
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
Dolomite is a sedimentary rock containing more than 50 percent of the mineral dolomite by weight
History
Origin
-
Southern Alps, France
Discoverer
Alexandre Brongniart and René Just Haüy
Dolomieu
Etymology
From Greek trakhus rough’ or trakhutēs roughness
From French, from the name of Dolomieu (1750–1801), the French geologist who discovered the rock
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
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Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock