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According to radiometric dating, the Morrison Formation dates from 156.3 ± 2 million years old at its base, [3] to 146.8 ± 1 million years old at the top, [4] which places it in the earliest Kimmeridgian, and early Tithonian stages of the late Jurassic.
The fauna of Morrison Formation is similar to one in the coeval rocks of Tendaguru Beds (in Tanzania) and Lourinhã Formation in Portugal, [1] mostly with the second. Some genera are shared in Morrison and Lourinhã, such as Torvosaurus, [2] Ceratosaurus, [3] Stegosaurus, Dryosaurus, [4] and Allosaurus. [5] In sum, Morrison Fm has 37 valid ...
Name Age Location Part of Description Cleveland-Lloyd Dinosaur Quarry: Jurassic USA Morrison Formation: Bonebed containing at least 44 Allosaurus as well as remains from Camarasaurus, Stegosaurus, Camptosaurus, Marshosaurus, and many other genera
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, [12] to 146.8 million years old at the top, [13] which places it in the late Oxfordian, Kimmeridgian, and early Tithonian stages of the Late Jurassic period.
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 ...
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, [10] to 146.8 million years old at the top, [11] which places it in the late Oxfordian, Kimmeridgian, and early Tithonian stages of the Late Jurassic period.
The late actor's mother Suzanne Morrison, stepfather Keith Morrison and sisters spoke exclusively with 'Today' on the one-year anniversary of his death ... Perry died at the age of 54 on Oct. 28 ...
Age Unit Notes Images Antonio [1] TMP 1994.182.0001 ... Morrison Formation Dracula [157] Allosaurus jimmadseni: Morrison Formation: Ebenezer Creation Museum: