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