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The Morrison Basin, which stretched from New Mexico in the south to Alberta and Saskatchewan in the north, was formed during the Nevadan orogeny, a precursor event to later orogenic episodes that created the Rocky Mountains started pushing up to the west.
It was the rarest sauropod in the Morrison Formation. [67] B. sp. Wyoming, Utah and Oklahoma Brontosaurus. B. excelsus. Wyoming, Brushy Basin member [57] [68] Two postcranial skeletons. [57] Previously considered a species of Apatosaurus as per Riggs (1903). B. parvus. Utah and Wyoming, Salt Wash and Brushy Basin members Three headless ...
Carnegie Quarry is located in the Brushy Basin Member of the Morrison Formation. The site has been dated to between 150.91 and 150.04 million years ago. [5] The quarry is located in a sandstone bed known as the Quarry Sandstone. The Quarry Sandstone is unusual for the upper Morrison Formation in being relatively coarse-grained. [6]
Colorado and Utah (Brushy Basin Member) More than 300 specimens, three dimensional calcitic casts of a two-seeded compound cone Tentatively assigned as a gnetale, with some attributes of the cones pointing towards a close relation with the extant genus Ephedra. Dayvaultia [4] D. tetragona. Henry Mountains of Utah (Brushy Basin Member)
Camarasaurus (/ ˌ k æ m ər ə ˈ s ɔː r ə s / KAM-ər-ə-SOR-əs) was a genus of quadrupedal, herbivorous dinosaurs and is the most common North American sauropod fossil. Its fossil remains have been found in the Morrison Formation, dating to the Late Jurassic epoch (Kimmeridgian to Tithonian stages), between 155 and 145 million years ago.
The Mother's Day Quarry (MDQ) is a Late Jurassic (Kimmeridgian) fossil site in the Morrison Formation that is located at the base of the Pryor Mountains in Carbon County, Montana. The site was first discovered by the Museum of the Rockies in 1994 and has produced over 2,500 elements since its discovery.
The Morrison Formation is interpreted as a semiarid environment with distinct wet and dry seasons. The Morrison Basin where dinosaurs lived, stretched from New Mexico to Alberta and Saskatchewan, and was formed when the precursors to the Front Range of the Rocky Mountains started pushing up to the
The Morrison Formation is a sequence of shallow marine and alluvial sediments which, according to radiometric dating, ranges between 156.3 million years old at its base, [18] to 146.8 million years old at the top, [19] which places it in the late Oxfordian, Kimmeridgian, and early Tithonian stages of the Late Jurassic period.