Verdete
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Verdete is a type of slate rock found in Brazil.[1]
Major deposits are found in the state of Minas Gerais.[1]
The term verdete is the local name for occurrences of a greenish rock that is high in both potassium and iron. The main potassium bearing minerals are glauconite and muscovite.[citation needed]
References[edit]
- ^ a b "New technology to extract potash from verdete slate". International Mining. 2010-12-06. Retrieved 2020-08-14.
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