Pelite

Pelite (Greek Pelos, Clay) is an alternative name for any argillaceous rock or lithified mudstone. Pelitic rock also refers to a metamorphosed argillaceous sediment.

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Pilite is a rarely used name for an altered olivine that has partially pseudomorphically replaced by an assemblage of carbonate–chlorite–actinolite. Pilite can be identified only in a thin section.

See also

Psammite