the formation of organic rocks is usually found in the ocean
find_underground is rocks. find_underwater is aquatic_plant. oceanfront is not geological_formation. ocean is home_to_multiple_organic_creatures. oceanfront is geological_formation. find_underwater is sand. arenaceous_rock is sedimentary_rock. find_underwater is not aquatic_plant. natural_elevation is geological_formation. shale is clastic_sedimentary_rock.