Definition
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
A water-soluble mineral sediment resulting from concentration and crystallization by evaporation from an aqueous solution
History
Origin
-
USA
Discoverer
Alexandre Brongniart and René Just Haüy
Usiglio
Etymology
From Greek trakhus rough’ or trakhutēs roughness
From a sediment left after the evaporation
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft 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