Tuesday, January 15, 2019

TIME FILE: Ghost Ranch Formation - Arizona, 200 million years ago

"The dry lands of a recovering world"
(based on the Ghost Ranch and Chinle Formations)



Description
Following the Great Dying of the Permian, desert and arid plains still dominate the landscape. Despite the harshness of the terrain, a massive lake dominates the middle. Greenery exists but is scattered and not in abundance.

Geography
Pillars of rock rise to the east and in the centre-west lies a massive lake. The parched land is recovering from the Permian and as such, is still in lack of green food. Massive herds migrate through occasionally, providing predators with a great opportunity for gains, if they can conquer their prey.

Features
Deserts, arid plains, lakes and shoes

Rock Type
Siltstone, sandstone and mudstone

Fossilisation Extent
A massive lake created a steady supply of fossils via siltstone fossilisation.

Animals
Aetosaurs – Adamanasuchus, Desmatosuchus, Rioarribasuchus, Paratypothorax, Scutarx, Stenomyti, Typothorax, Calyptosuchus
Crurotarsans – Hesperosuchus
Phytosaurs – Leptosuchus, Smilosuchus, Paleorhinus, Machaeroprosopus, Pravusuchus, Protome, Redondasaurus
Paracrocodylomorphs – Shuvosaurus, Effigia, Poposaurus, Postosuchus, Saurosuchus, Vivaron
Theropods – Camposaurus, Chindesaurus, Coelophysis, Daemonosaurus, Gojirasaurus, Tawa Hallae
Prosauropods - Plateosaurus
Drepanosaurs – Avicranium, Dolabrosaurus, Drepanosaurus
Proterochampsia – Doswellia
Tanystropheidae – Tanytrachelos
Allokotosaurs – Trilophosaurus
Archosauriformes – Vancleavea
Dicynodonts – Placerias
Turtles – Chinlechelys
Procolophonidae – Colognathus
Sphereodont – Whitakersaurus
Temnospondyli – Koskinonodon, Chinlestegophis
Fish – Acrodus, Lonchidion, Xenacanthus, Chinlea, Arganodus, Australosomus, Hemicalypterus, Cionichthys, Lasalichthys, Lophionotus, Synorichthys, Tanaocrossus
Other – Termites, Beetles, Scorpions, Millipedes, Dung Beetles, Wasps, Flies

Plants
Conifers, cycads and horsetails

Most plants were riparian, living near the water sources like lakes. Only tough conifers and ferns could live away from direct sources of hydration.



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