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Your sedimentary rock is a bit of a puzzle! Try going back
to the
sedimentary key
and using the key for grains less than 0.5mm, or try the
keys for
igneous
and
metamorphic
rocks. If you are still unable to identify your
rock you could borrow a book from your local library, search the
Virtual Store
which features lots of rocks, or ask your local museum for help.
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