Definition
Wehrlite is an ultramafic and ultrabasic rock that is a mixture of olivine and clinopyroxene. It is a subdivision of the peridotites
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
History
Origin
Egypt
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Discoverer
Alois Wehrle
Alexandre Brongniart and René Just Haüy
Etymology
From the name of a professor, Alois Wehrle
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
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock