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Your sedimentary rock is a bit of a puzzle! Try going back
to the
sedimentary key
and trying the key for grains bigger 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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