ammonite fossil in stone close

ammonit ammonite ammonitida ammonoidea ancient background black cephalopod close closeup evolution extinction field fossil fossilate fossilization fossilized geologic geology germany holzboden horizontal jurassic macro marine marineanimal mineral mollusc mollusca mollusk natural nature old palaeontology petrify polyp prehistoric quadrate section serpentstone shell skeleton snakestone souvenir specimen stone stuttgart