Ключевые слова: a lack of oxygen, ancient, aquarium, background, brown, buried, buried in sand, buried in snow, cambrian, decay, decoration, dinosaur, drift, eon, evolution, extinct, fossil, fossil of a plant, geology, isolated, log, million, mineral, nature, not decay, old, orange, ornament, ornamental, paleontology, petrified, petrified wood, piece, polish, polished, prehistoric, prehistory, research, rock, section, shiny, single, slice, stone, texture, time, tree, trunk, white, wood,