Definition
Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism
An iron rich extrusive rock found as a member of the alkali basalt magma series
History
Origin
England
Isle of Mull, Scotland
Discoverer
Abraham Gottlob Werner
Ben More
Etymology
From Old French esclate, from esclat (French éclat)
From the name of discoverer, Ben More
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock