Ключевые слова: abstract, age, aged, background, closeup, cockleshell, color, concept, conceptual, coquina, cretaceous, curves, diversity, element, geological, geology, granite, historic, historical, jurassic, macro, material, mesozoic, mineral, mussel, palaeontology, paleontology, pink, prehistoric, red, rock, secondary, shell, stone, strong, texture, triassic,