Dinosaur National Monument Dinosaur National Monument comprises 210
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Dinosaur National Monument
• Dinosaur National Monument comprises 210, 000 acres (325 square miles) of park. It straddles Northern Colorado and Utah, with about 2/3 of its land in Colorado
• In 1909 the paleontologist Earl Douglass from the Carnegie Museum in Pittsburg was the first scientist to document the many dinosaur bones in the area
• Thousands of bones were discovered on the site • Many were moved to the Carnegie Institute including some complete skeletons of creatures such as the small Camptosaurus and the plated Stegosaurus • By 1915 the site was made a national monument, and while there is still excavation bones are no longer removed.
• The bones were found in the Morrison formation • The Morrison formation is in the upper Jurassic and is one of the richest in dinosaur fauna • The Morrison Formation is extremely widespread, covering more than 1. 5 million sq. Km of western USA. Within its spread it represents a number of environments, from hot, arid desert in the southwestern portions to a much wetter and swampier environment in the north.
• Several rare specimens of dinosaur have been discovered at Dinosaur National Monument • These specimens include the first cranial material from the Marshosaurus • portions of an advance embryo of a Camptosaurus • The longest dinosaur skeleton ever discovered was found here as well
MORRISON FORMATION DINOSAURS FOUND AT DINOSAUR NATIONAL MONUMENT
MORRISON FORMATION DINOSAURS FOUND AT DINOSAUR NATIONAL MONUMENT
Evolutionary condition • Plant productivity was high during this time in order to have supported so many large herbivores • But there is also indication that water was periodically in short supply. This is seen inthe lack of coal, small aquatic vertebrates, and the oxidization of sediments. • Also a seasonal shift may have necessitated migration for herbivores leading to the regular distribution of fossils over such a broad area.
Bibliography • http: //www. americansouthwest. net/utah/dinosaur/national_monume nt. html • http: //www 2. nature. nps. gov/geology/paleontology/nps_paleo_vol 1/di no. htm • http: //books. google. com/books? hl=en&lr=&id=AWLCBwh 7 a. Rc. C&oi =fnd&pg=PR 11&dq=Dinosaur+national+monument&ots=6 ze. KCLc. N Uu&sig=dl. DCVWyy 8 AZvutjc 1 b. Bx. MRU 9 Azs#PPA 111, M 1 • http: //www. jstor. org/view/00948373/di 995904/99 p 0244 r/0 • http: //www. jstor. org/view/08831351/sp 060071/06 x 0817 k/0 • http: //www 2. nature. nps. gov/geology/geologic_wonders/7_12 list. cfm • http: //www. wvup. edu/ecrisp/fieldstudiesinutah. html • http: //geoinfo. amu. edu. pl/wpk/pe/a/harbbook/c_i/chap 01. html • http: //www 2. nature. nps. gov/geology/education/Foos/dino. pdf • http: //www. fossilmuseum. net/Fossil_Sites/morrison. htm • http: //www. dinoruss. com/de_4/5 ca 00 c 3. htm
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