sedimentary rocks are formed by sediment compacting together
sedimentary is rock. arenaceous_rock is sedimentary_rock. shale is clastic_sedimentary_rock. sedimentary_clay is soil. clastic_rock is rock. sandstone is clastic_sedimentary_rock. clastic_sedimentary_rock is sedimentary_rock. sedimentary_rock is rock. settlings is sediment. sedimentary_rock is stone.