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clean

1. adj. [Geology]

Pertaining to a sedimentary rock, such as sandstone or limestone, that contains only minimal amounts of clay minerals. Clean reservoir rocks typically have better porosity and permeability than dirty rocks whose pores are clogged with fine clay particles. Clean and dirty are qualitative, descriptive terms.

Antonyms: dirty

See: eolianlimestonesandstonesedimentary

Photomicrograph of clean sandstone.
Photomicrograph of clean sandstone.

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