Subsequent fossil stone layer was eroded decay. Then the carcass may be eroding the original stone floor, or get out of the stone on the floor is missing, eroded rocks. Fossil shelves.
Later, shale containing fossilized eroded eroding. The remains may have been eroded out of the rocks. Or on the rocks being eroded away, making the stone. Layers with fossils have
Later I rock with the fossils were eroded corrosive The rubble may be eroded out of the rock. Or rock was eroded away on the rocks. Layer with fossils.