ammonite is a fossilization of a squid enclosure, photographed with macro lens in studio

abstract ammonite ammonites amonite ancient animals background brown cephalopod circles circular close closeup coil design detail discovery enclosure evolution extinct fossil fossilization fossilized fossils fractal geological geology lens macro marine mineral mollusc natural nature nautilus paleontology pattern petrified photographed prehistoric rock seashell shell snail spiral squid stone studio surface texture textured this