dirty | Energy Glossary

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dirty

1. adj. [Geology]

Describing sedimentary rock that contains clay minerals. Even small amounts of clay minerals in pores can drastically reduce porosity and permeability. Dirty and clean are qualitative, descriptive terms to describe the relative amount of clay minerals in a rock.

Antonyms: clean

See: limestoneporesandstone

Photomicrograph of clean and dirty sandstone.