sedimentary rocks are formed by deposition
clastic_sedimentary_rock is sedimentary_rock. geological_formation is layer. limestone is sedimentary_rock. sedimentary_rock is stone. sedimentary_clay is soil. sedimentary is not rock. clastic_sedimentary_rock is not sedimentary_rock. sedimentary_rock is rock. shale is clastic_sedimentary_rock. sedimentary is rock.