Ключевые слова: aged, ammonite, ancient, ancient life, antique, belemnite, cast, circle, detail, digged, digging, dug up, evolution, evolutionary, extinct, extinct creature, extremely old, fossil, fossil record, fossilization, geological, jura, jurassic, marks, mold, molluscs, mussel, once living, organism, outdated, paleontology, prehistoric, preserves organism, scale, shell, snail, snail fossil, specimen, spiral, stone, stone imprint, stone imprints, texture, timescale, trace, trace fossil, tracks, wheel,