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Rhyolite
Rhyolite

Anorthosite
Anorthosite



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Rhyolite
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Anorthosite
Definition

Definition

Origin

Discoverer

Etymology

Class

Sub-Class

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Rhyolite is a fine-grained igneous rock which is rich in silica
North America
Ferdinand von Richthofen
From German Rhyolit, from Greek rhuax lava stream + lithos stone
Igneous Rocks
Durable Rock, Hard Rock
Volcanic
Coarse Grained Rock, Opaque Rock
 
Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase
-
Unknown
From French anorthose plagioclase + -ite1
Igneous Rocks
Durable Rock, Medium Hardness Rock
Plutonic
Coarse Grained Rock, Opaque Rock