GEOL 1020 Lecture Notes - Lecture 34: Eoraptor, Ischigualasto Provincial Park, Shoulder Girdle
14 Nov 2016
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Document Summary
251 - 199 ma: time of transition, world-continent of pangaea existed, altering global climate and ocean circulation, follows one of the largest extinction events in history of the world. Origin: named by friedrich von alberto. Tectonics and climates: late paleozoic, beginning of the mesozoic. Rifts across the tethys ocean to collide with asia. Gondwana broke apart, (south america, africa, india, antarctica, australia) No polar ice caps: the poles were warmer than present temps. Sea levels rose as rift grew between north america and southern europe. The rocks are rocks (found in parts of colorado) Late triassic deposits of the ischigualasto formation: contains some of the oldest known dinos, second earliest record of dino fossils. Ischigualasto dinosaurs two of the most exciting dinosaur finds at ischigualasto are shown here. Originally known from fragmentary remains, a complete and intact skull was found on an expedition in 1988. Eoraptor lunensis, one of the most primitive dinosaurs yet discovered.
