standing alone ammonite fossil

ammonites shelled index fossil wrinkles shadows texture relief polished cotton cloth ammonideans moroccan origin albian vertical cretaceous 110 million years sectioned standing alone ammonoids extinct marine mollusc animals cephalopoda mollusks rock layer mineral species fauna nature geologic planispirals helically spiraled fossilized shells ammonis cornua horns ammon egyptian god amun rams natural light closeup macro isolated white background prehistorical invertebrates