Famous Fossil Sites of the Grand Valley • MWC The original extent of the Brushy Basin to the south ana west is not known, for it has been removed by pre-Dakota erosion from most of northeastern Arizona. The record of volcanism in the Brushy Basin Member of the Morrison ... University of Massachusetts, Amherst. Dinosaur material was collected from the upper Brushy Basin Member of the Morrison Formation (Jurassic) on Little Cedar Mountain in east-central Utah. File:Brushy Basin Mbr, Morrison Fm.jpg. Figure 4. Morrison Formation - Canyonlands National Park (U.S. National Park Service) Abstract Two new chemical abrasion thermal ionization mass spectrometry U/Pb dates establish the age of the top of the Brushy Basin Member, Morrison Formation, at Flat Top (also known as Terrace Hill), north of the Fruita Paleontological Research Natural Area (FP), and of the lower part of the Brushy Basin Member, in the region of the Trail through Time (TT) and Mygatt-Moore Dinosaur Quarry in . Morrison_Formation : definition of Morrison_Formation and synonyms of ... Colorful, rounded slopes are typical of the Brushy Basin Member of the ... However, as mentioned above, Scott et al. Pre- The Junction Creek Sandstone Mem-ber of southwestern Colorado (O'Sullivan, 1997) is . Most of the fossils occur in the green siltstone . Fluvial architecture element analysis of the Brushy Basin Member ... Most of the fossils occur in the green siltstone . This stratigraphic interval consists of as many as four lithofacies deposited in fluvial and playa-lake environments. In southwestern Colorado and southeastern Utah strata of conglomeratic sandstone are localized at the base of the Brush Basin shale member of the Morrison formation of Jurassic age. Morrison Formation (Tidwell Member, Salt Wash Member, Brushy Basin Member) Age: Figure 1: Paleogeographic map of the Middle Jurassic, Page Sandstone, Carmel Formation, Entrada Sandstone, Curtis Formation, and Summerville Formation. I am 100% confident this is bone, and almost certainly dinosaur based on size. 23, T50N, R14W, Montrose County, Colorado. PDF Reconstruction of the Upper Jurassic Morrison Formation extinct ...