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The Morrison Formation is a distinctive sequence of Upper Jurassic sedimentary rock found in the western United States which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone , sandstone , siltstone , and limestone and is light gray, greenish gray, or red.
The Morrison Formation is a distinctive sequence of Upper Jurassic sedimentary rock that is found in the western United States, which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandstone, siltstone and limestone and is light grey, greenish gray, or red.
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]
The Morrison Formation is a distinctive sequence of Late Jurassic sedimentary rock that is found in the western United States, which has a wide assortment of taxa represented in its fossil record, including dinosaur fossils in North America.
Would have lived in present-day Mexico. Its fossils were only found in California due to the shifting of tectonic plates Allosaurus: 1877 Morrison Formation (Late Jurassic, Kimmeridgian to Tithonian) United States ( Colorado Oklahoma Utah Wyoming) Multiple specimens have been discovered, making it well-known both popularly and scientifically.
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.
Locations in the Morrison Formation (yellow) where Allosaurus remains have been found. Allosaurus was the most common large theropod in the vast tract of Western American fossil-bearing rock known as the Morrison Formation, accounting for 70 to 75% of theropod specimens, [106] and as such was at the top trophic level of the Morrison food chain ...
Within the Morrison and Lourinhã Formation, Ceratosaurus fossils are frequently found in association with those of other large theropods, including the megalosaurid Torvosaurus [43] and the allosaurid Allosaurus. The Garden Park locality in Colorado contained, besides Ceratosaurus, fossils attributed to Allosaurus.