Definition
Whiteschist is an uncommon rock type belonging to a class of metamorphic rock, this is formed at high-ultra-high pressures
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
History
Origin
Tasmania
-
Discoverer
Unknown
Alexandre Brongniart and René Just Haüy
Etymology
From French schiste, Greek skhistos i.e. split
From Greek trakhus rough’ or trakhutēs roughness
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock