circular d and polished ammonite fossil

ammonites shelled index fossil isolated white background polished circular shaped sectioned turned moroccan origin albian cretaceous 110 million years ammonoids extinct marine mollusc animals cephalopoda molluscs rock layer mineral species fauna nature geologic planispirals helically spiraled fossilized shells ammonis cornua horns ammon egyptian god amun rams natural light closeup macro prehistorical invertebrates