mylonite

my·lo·nite  (ml-nt)

n.

A fine-grained laminated rock formed by the shifting of rock layers along faults.

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[Greek muln, mill (from mul, handmill; see mel- in Indo-European roots) + -ite.]

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mylonite [ˈmaɪləˌnaɪt ˈmɪlə-]

n

(Earth Sciences / Geological Science) a fine-grained metamorphic rock, often showing banding and micaceous fracture, formed by the crushing, grinding, or rolling of the original structure

[from Greek mulōn mill]

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mylonite  (ml-nt)

A fine-grained laminated metamorphic rock in which preexisting minerals have been partially pulverized and drawn out into bands. Mylonite forms along geologic faults where shearing and grinding of rocks takes place.