1 Definition
1.1 Definition
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
Wehrlite is an ultramafic and ultrabasic rock that is a mixture of olivine and clinopyroxene. It is a subdivision of the peridotites
1.2 History
1.2.1 Origin
1.2.2 Discoverer
Alexandre Brongniart and René Just Haüy
Alois Wehrle
1.3 Etymology
From Greek trakhus rough’ or trakhutēs roughness
From the name of a professor, Alois Wehrle
1.4 Class
Igneous Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock