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sedimentary
sand
Siltstone can be formed from the eroded and transported particles of any rock type.
it forms is Obion and Igneous
Any type of rock, igneous, metamorphic or sedimentary, can become eroded and re-deposited and cemented together to become a new sedimentary rock.
Sedimentary rock.
Igneous Rock comes from molten rock.
Igneous rock
No. Extrusive igneous rocks are usually layered. Some metamorphic rocks have foliation, which resembles layering, but it is not the same thing.
That would be sedimentary rock, and (honorable mention) occasionally metamorphic rock.
Igneous
Shale