Definition
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
Eclogite is an extreme metamorphic rock, formed by regional metamorphism of basalt rock under very high pressure and temperature
History
Origin
Italy
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Discoverer
Unknown
René Just Haüy
Etymology
From a Latin word tophous then in Italian tufo and finally tuff
From French, Greek eklogē selection with reference to the selective content of the rock + -ite1
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
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Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock