Ключевые слова: ammonitida, ancient, animals, archeology, backgrounds, botany, convex, dry, earth, effect, excavation, extinct, fern, fossil, geology, history, imitation, jurassic, leaf, mineral clay, minerals, mystery, nature, neuropteris, of course, old, out of date, paleontology, paleozoic, pattern, plants, power, prehistoric, preservation, rock era, science, sedimentary, shape, stone, the past, the skeleton, time, veins, wood,