Definition
Trachyandesite is an extrusive igneous rock.
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
History
Origin
Indonesia
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Discoverer
Unknown
Alexandre Brongniart and René Just Haüy
Etymology
From French trachyandésite, trachy + andésite andesite, a lava intermediate in composition between trachyte and andesite
From Greek trakhus rough’ or trakhutēs roughness
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock