Definition
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
Cataclasite is a type of cataclastic rock that is formed by fracturing and comminution during faulting. It is normally cohesive and non-foliated, consisting of angular clasts in a finer-grained matrix
History
Origin
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Swiss Alps, Europe
Discoverer
Alexandre Brongniart and René Just Haüy
Michael Tellinger
Etymology
From Greek trakhus rough’ or trakhutēs roughness
From the Italian word cataclasi
Class
Igneous Rocks
Metamorphic 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
Fine Grained Rock, Opaque Rock