LATE JURASSIC MORRISON FORMATION

The updated 042612

Melbourne Museum dryosaur(Leaellynasaura),CollectA Camptosaurus, Carnegie Safari Camarasaurus, CollectA dryosaur(Hypsilophodon), Predators Stokeosaurus, Carnegie Safari Diplodocus, Lontic dryosaur(Hypsilophodon), Carnegie Safari Stegosaurus, Carnegie Safari Allosaurus, Carnegie Safari Brachiosaurus, Carnegie Safari Apatosaurus.

Late Kimmeridgian: Salt Wash Member: The first purely terrestrial member. The basin was a semi-arid alluvial plain, with seasonal mudflats. The major players remain the same as seen in the in the Middle Kimmeridgian. The last of the basal sauropods are only found in the wetter north. There may be a trend among sauropods and theropods to become larger. Ornithopods tend to be small with only stegosaurs being common and large. There is scrappy evidence for a diversity of small theropods and dryosaurs.

Schliech Replicasaurus Allosaurus, Schliech brachiosaurs, Schliech Allosaurus, Schleich apatosaurs,Melbourne Museum dryosaur(Leaellynasaura), Safari Toob Chamatosaurus, Dinowaurs Coelurus(Compsognothus), Melbourne Museum dryosaur(Leaellynasaura), Schliech stegosaurs, Schliech Replicasaurus Allosaurus, CollectA Marshosaurus(Lourinhanosaurus), CollectA dryosaur(Hypsilophodon), Kaiyodo Camarasaurus, Schliech Replicasaurus Ceratosaurus, CollectA Camptosaurus, Schliech Junior Allosaurus and Invicta Diplodocus.

Tithonian: Brushy Basin Member: Much finer-grained than the Salt Wash Member, the Brushy Basin Member is dominated by mudstone rich in volcanic ash. Rivers flowed from the west into a basin that contained a giant, saline alkaline lake called Lake T'oo'dichi' and extensive wetlands that were located just west of the modern Uncompahgre Plateau. Deposition in the Morrison Formation ended about 147 Ma. The latest Morrison strata are followed by a thirty-million year gap in the geologic record. In Laurasia you see a new ornithopod fauna with new theropod families. There is a gradual change in flora as flowering plants spread. You still find ecologies in Gondwana into the Late Cretaceous.