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Oilfield Glossary
Oilfield Glossary
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mica

1. n. [Geology]
[Muscovite mica K2Al4(Si6Al2O20(OH,F)4]

A group of sheet silicates characterized by a platy appearance and basal cleavage most common in igneous and metamorphic rocks. Several clay minerals, such as chlorite and glauconite, are closely related to the mica group.