Definition
Eclogite is an extreme metamorphic rock, formed by regional metamorphism of basalt rock under very high pressure and temperature
Rhyolite is a fine-grained igneous rock which is rich in silica
History
Origin
-
North America
Discoverer
René Just Haüy
Ferdinand von Richthofen
Etymology
From French, Greek eklogē selection with reference to the selective content of the rock + -ite1
From German Rhyolit, from Greek rhuax lava stream + lithos stone
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock