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The Morrison Formation is subdivided into several members, the occurrence of which are varied across the geographic extent of the Morrison. Members are (in alphabetical order): [ 7 ] [ 8 ] Bluff Sandstone Member (AZ, CO, NM, UT): Well-sorted, light brown to white sandstone with large grains and components of chert.
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 ...
The Morrison Formation— a large Late Jurassic geologic formation in the Colorado Plateau region of the Western United States. Fossilized Late Jurassic North American animals of the Kimmeridgian and Tithonian ages are found in its paleontological sites , located primarily in western Colorado and eastern Utah.
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 ...
Sequence from orange cliff in foreground to cliff top in background Entrada Formation, Curtis Formation, Summerville Formation, capped by the (pink) Tidwell Member of the Morrison Formation. The San Rafael Group is a geologic group or collection of related rock formations that is spread across the U.S. states of New Mexico , Arizona , Utah and ...
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.
Mymoorapelta (Meaning "Shield from the Mygatt-Moore Quarry" after a combination of the names of the discoverers of the Mygatt-Moore Quarry that fossils were originally collected from, and the Greek word πέλτα, meaning "shield") is a nodosaurid ankylosaur from the Late Jurassic (Kimmeridgian-Tithonian, around 155 to 150 million years ago) Morrison Formation (Brushy Basin Member) of western ...
Download as PDF; Printable version ... fossilized mammals of the Morrison Formation — from the Late Jurassic period in North America. Pages in category "Morrison ...