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Phyllonite

A rock classification type
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A mylonite of phyllitic appearance dominated by platy minerals.

A rock that macroscopically resembles phyllite but that is formed by mechanical degradation (mylonitization) of initially coarser rocks (e.g., graywacke, granite, or gneiss). Silky films of recrystallized mica or chlorite, smeared out along schistosity surfaces, and formation by dislocation metamorphism are characteristic.

Synonym of: phyllite-mylonite

See also mylonite gneiss.


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Unique IdentifiersHide

Mindat ID:
48669
Long-form identifier:
mindat:1:1:48669:5

Similar NamesHide

FulloniteA synonym of GoethiteFe3+O(OH)

Classification of PhylloniteHide

Internet Links for PhylloniteHide

References for PhylloniteHide

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