1 Definition
1.1 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
Ignimbrite is a volcanic rock consisting mainly of pumice fragments, formed by the consolidation of material deposited by pyroclastic flows
1.3 History
1.3.1 Origin
2.1.1 Discoverer
2.3 Etymology
From Old French esclate, from esclat (French éclat)
From Latin ignis fire + imber, imbr- shower of rain, storm cloud + -ite
2.5 Class
Metamorphic Rocks
Igneous Rocks
2.5.2 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
2.6 Family
2.6.1 Group
2.7 Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock