geology question?

George · #1 (**permalink**) 03-06-2008, 10:02 AM

what is the processes of the rock cycle that leads to the formation of slate???
this is a four mark question, so one words isnt enough

littleangels0305 · #2 (**permalink**) 03-06-2008, 10:02 AM

Sedimentary rocks are formed in three steps:

1. Layers of sediment are deposited at the bottom of seas and lakes.
2. Over millions of years the layers get squashed by the layers above.
3. The salts that are present in the layers of sediment start to crystallize out as the water is squeezed out. These salts help to cement the particles together.

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