shale is a kind of sedimentary rock
humic_shale is shale. oil_shale is shale. oil_shale is not shale. sedimentary_rock is stone. shale is not clastic_sedimentary_rock. shale is not sedimentary_rock. shale is sedimentary_rock. shale is clastic_sedimentary_rock. sedimentary_rock is rock. sedimentary is rock.