Slate is the low-pressure, low-temperature metamorphic rock whose parent rock (protolith) was shale. Clay minerals which were present in the shale have started to change into mica, a platy mineral, which give slate its cleavability. Because the transformation of the clay minerals is not complete, slate generally appears dull in light.
With exposure to higher temperatures and pressures, shale will become the metamorphic rock phyllite. In phyllite, the transformation of the clay minerals to nearly visible micas and other minerals is nearly complete, giving the rock a very shiny appearance. It may also appear wavy and foliated.
With higher temperature and pressure, phyllite will become the metamorphic rock schist.
Phyllite is metamorphosed slate, which is also a metamorphic rock. Shale or mudstone is the protolith (parent rock) of slate.
phyllite
If slate is sufficiently heated and compressed it becomes phyllite.
No. Contact metamorphism will most likely alter shale into hornfels. Phyllite is regionally metamorphosed slate, and slate is metamorphosed shale.
Pennsylvania is home to quartzite, slate, marble, phyllite, gneiss, and schist
Phyllite is a type of metamorphic rock that comes from adding heat, pressure, and/or chemically active fluids to slate. Slate is the parent, or originial, type of rock from which the phyllite forms. It could also be said that slate recrystallizes into phyllite. Slate is also a metamorphic rock that starts out as the sedimentary rock called shale. Therefore, phyllite comes from slate, which comes from shale. Phyllite is different from slate because it has been metamorphosed more. As a result, the straight lines/planes (called foliation) that slate breaks along, are absent in phyllite, which is distinctly wavy in appearance. If more metamorphism is applied to phyllite, it recrystallizes into schist.
The degree of metamorphism. Phyllite is slate further metamorphosed.
The parent rock or protolith of phyllite is slate.
Phyllite is metamorphosed slate, which is also a metamorphic rock. Shale or mudstone is the protolith (parent rock) of slate.
phyllite
Phyllite is a foliated metamorphic rock. It's cleavage resembles that of slate. It is often distinguished from slate because it has shiny metallic luster. Phyllite also has very fine grains.
Phyllite is a foliated metamorphic rock whose parent rock is slate.
If slate is sufficiently heated and compressed it becomes phyllite.
slate
Phyllite is a fine grained metamorphic rock. It is formed by shale forming into slate, and slate being put under physical pressure over time.
No. Contact metamorphism will most likely alter shale into hornfels. Phyllite is regionally metamorphosed slate, and slate is metamorphosed shale.
slate, phyllite, schist, gneissslate, schist, phyllite