Ключевые слова: ancestor, archaeological, artifact, bed, biology, cockerellites, diplomustus, display, eocene, era, evolution, excavations, fauna, fish, formation, fossilized, geologic, geological, geology, green, history, layer, limestone, matrix, middle, mortality, museum, original, paleontology, past, petrified, prehistoric, prehistory, preparation, prepared, presentation, primeval, priscacara, quarry, river, rock, school, science, sediment, sedimentary, skeleton, sunfish, taphonomy, wildlife,