Title: Evolution of fossil ecosystems
Subjects: Evolutionary paleoecology, Fossils, Paleontology, Shale, Fossils -- North America, SCIENCE / Paleontology, Geology, Science, NATURE / Fossils, NATURE / Animals / Dinosaurs & Prehistoric Creatures, Palaeontology, Science/Mathematics, Life Sciences - Ecology - Ecosystems, Science / Earth Sciences, Earth Sciences - General, North America, Palökologie, Evolution, Fossile Pflanzen, Fossile Tiere, Ökosystem, Paleontological excavations, Fossil, Lagerstätte, Paléoécologie évolutive, Fossiles, Schiste
Places: North America