Ключевые слова: ammonite, ancient, animal, archeology, arthropod, brush, dactylioceras, discovery, evolution, excavation, exoskeleton, extinct, extinction, fossil, fossilization, fossilized, geological, geological history, geology, impression, invertebrate, jurassic, jurrasic, marine, mineral, minerals, natural, nature, old, paleontology, pattern, prehistoric, preserved, rock, sand, science, sea, sedimentary, shell, skeleton, spiral, stone, texture, textured, tools,