Slate
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About Slate
As a Commodity:
i. An ultrafine- or very fine-grained rock displaying strong slaty cleavage and hence can be split into slabs and thin plates. Most slate was formed from shale. Slate is usually of very low to low metamorphic grade conditions.
Ref: AGI
ii. A coal miner's term for any shale accompanying coal; also, sometimes the equivalent of bone coal.
Ref: AGI
iii. A fine-grained metamorphic rock that breaks into thin slabs or sheets. Usually gray to black, sometimes green, yellow, brown, or red. Slates are composed of quartz, micas, chlorite, with minor hematite, clays and other minerals.
Ref: AGI
ii. A coal miner's term for any shale accompanying coal; also, sometimes the equivalent of bone coal.
Ref: AGI
iii. A fine-grained metamorphic rock that breaks into thin slabs or sheets. Usually gray to black, sometimes green, yellow, brown, or red. Slates are composed of quartz, micas, chlorite, with minor hematite, clays and other minerals.
Classification of Slate
Sub-divisions of Slate
- Slate
Synonyms of Slate
Other Language Names for Slate
German:Tonschiefer
Norwegian:Skifer
References for Slate
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Fettes (et al.), Metamorphic Rocks - A Classification and Glossary of Terms (2007) Cambridge University Press
Klaus K.E. Neuendorf, James P. Mehl, Jr., and Julia A. Jackson (Editors), 2017.
Glossary of Geology. Fifth REVISED edition. American Geological Institute (abbreviated as AGI).
Internet Links for Slate
mindat.org URL:
https://www.mindat.org/min-48638.html
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Search Engines:
Louzeiras de Canelas quarry, Canelas e Espiunca, Arouca, Aveiro, Portugal