sedimentary tadpole are formed by sublimation / cementation
sedimentary is rock. geological_formation is layer. shale is clastic_sedimentary_rock. sedimentary_clay is soil. limestone is sedimentary_rock. superposition is deposition. sandstone is clastic_sedimentary_rock. clastic_sedimentary_rock is sedimentary_rock. sedimentary_rock is rock. sedimentary_rock is stone.