Phyllite is a type of foliated metamorphic rock created from slate that is further metamorphosed so that very fine grained white mica achieves a preferred orientation. source
Phyllite is a type of foliated metamorphic rock created from slate that is further metamorphosed so that very fine grained white mica achieves a preferred orientation.
Phyllite is primarily composed of quartz, sericite mica, and chlorite. source
Phyllite is primarily composed of quartz, sericite mica, and chlorite.
Phyllite has fine-grained mica flakes in a preferred orientation, whereas slate has extremely fine clay flakes that achieve a preferred orientation. source
Phyllite has fine-grained mica flakes in a preferred orientation, whereas slate has extremely fine clay flakes that achieve a preferred orientation.
Phyllite represents a gradation in the degree of metamorphism between slate and schist. source
Phyllite represents a gradation in the degree of metamorphism between slate and schist.
The minute crystals of graphite, sericite, or chlorite, or the translucent fine-grained white mica, impart a silky, source
The minute crystals of graphite, sericite, or chlorite, or the translucent fine-grained white mica, impart a silky,
sometimes golden sheen to the surfaces of cleavage, called "phyllitic luster". source
sometimes golden sheen to the surfaces of cleavage, called "phyllitic luster".
The word comes from the Greek phyllon, meaning "leaf". source
The word comes from the Greek phyllon, meaning "leaf".
The protolith (or parent rock) for phyllite is shale or pelite, or slate, which in turn came from a shale protolith. source
The protolith (or parent rock) for phyllite is shale or pelite, or slate, which in turn came from a shale protolith.
Phyllite s constituent platy minerals are larger than those in slate but are not visible with the naked eye. source
Phyllite s constituent platy minerals are larger than those in slate but are not visible with the naked eye.
Phyllites are said to have a texture called "phyllitic sheen," . source
Phyllites are said to have a texture called "phyllitic sheen," .
Phyllite are usually classified as having formed through low-grade metamorphic conditions through regional metamorphism metamorphic facies. source
Phyllite are usually classified as having formed through low-grade metamorphic conditions through regional metamorphism metamorphic facies.
Phyllite has good fissility (a tendency to split into sheets). source
Phyllite has good fissility (a tendency to split into sheets).
Phyllites are usually black to gray or light greenish gray in color. source
Phyllites are usually black to gray or light greenish gray in color.
Phyllite is commonly found in the Dalradian metasediments of northwest Arran. source
Phyllite is commonly found in the Dalradian metasediments of northwest Arran.
In north Cornwall, there are Tredorn phyllites and Woolgarden phyllites. source
In north Cornwall, there are Tredorn phyllites and Woolgarden phyllites.
