Search results
Results from the WOW.Com Content Network
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 Morrison Formation is a distinctive sequence of Upper Jurassic sedimentary rock that is found in the western United States, ... The Age of Dinosaurs. Publications ...
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
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, [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
In 2009, a study by J. R. Foster was published which estimated the body masses of mammals from the Morrison Formation by using the ratio of dentary length to body mass of modern marsupials as a reference. Foster concludes that Docodon was the most massive mammaliaform genus of the formation at 141g and Fruitafossor was the least massive at 6g ...
Galeamopus is a genus of herbivorous diplodocid sauropod dinosaurs.It contains two known species: Galeamopus hayi, known from the Late Jurassic lower Morrison Formation (Kimmeridgian age, about 155 million years ago) of Wyoming, United States, and Galeamopus pabsti, known from the Late Jurassic fossils from Wyoming and Colorado.
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.