Phyllite (/ ˈfɪlaɪt / FIL-yte) is a type of foliated metamorphic rock formed from slate that is further metamorphosed so that very fine grained white mica achieves a preferred orientation. [1]

Phyllite is a very common metamorphic rock, found in many parts of the world. It forms when sedimentary rocks are buried and mildly altered by the heat and directed pressure of regional …

phyllite, fine-grained metamorphic rock formed by the reconstitution of fine-grained, parent sedimentary rocks, such as mudstones or shales. Phyllite has a marked fissility (a tendency to …

Apr 13, 2019 · Phyllite is a foliated metamorphic rock that has been low pressure and heat. Phyllite formation from slate to metamorphosed so that very fine grained mica.

Type Metamorphic Rock Texture Foliated; Fine-grained Composition Muscovite, Biotite, Quartz, Plagioclase Index Minerals Color Shiny Gray Miscellaneous Foliation surface has a satiny …

A phyllite is a fine-grained, foliated metamorphic rock with a strong fissility. Its primary feature is that foliation planes show a lustrous sheen, caused by the presence of oriented phyllosilicates …

The protolith (or parent rock) for phyllite is usually shale or pelite, via slate. Its constituent platy minerals are larger than those in slate but are not visible with the naked eye.

Nov 7, 2025 · Phyllite is a metamorphic rock, distinguished by a unique, silky luster. Its name is derived from the Greek word phyllon, which translates to “leaf,” referencing the rock’s …

Phyllite is a fine-grained metamorphic rock that typically exhibits a distinct sheen, making it visually appealing. Its composition largely consists of quartz and mica minerals, mainly biotite …

Phyllite is a type of foliated metamorphic rock, meaning its minerals are aligned in layers. Its main characteristics are a fine-grained texture, a wrinkled or wavy surface, and a distinctive silky or …