The rock types that generally form prograde methamorphism of pelites are gravel, sandy and clayey.
Pelite is a geological term to refer to those rocks that are characterized by:
- Being the metamorphic form of fine grains of sedimentary rock.
- Another name by which they are known is metapelita.
These rocks are classified according to the texture or size of the sediment grains which are:
- Coarse textured grains, commonly known as full of gravel, is also known as Psefita (ancient Greek name) or rudite (Latin name)
- Grain of medium texture, commonly known as sandy, is also known as Psamite (ancient Greek name) or arenite (Latin name)
- Fine grain, commonly known as clayey. It is also known as pelite (ancient Greek name) or lutita (Latin name)
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