Nielsen Gulch (DNM) (Jurassic to of the United States)

Also known as Dinosaur National Monument, Marshosaurus

Where: Uintah County, Utah (40.4° N, 109.3° W: paleocoordinates 36.5° N, 55.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Brushy Basin Member (Morrison Formation), Kimmeridgian to Kimmeridgian (157.3 - 145.0 Ma)

• lower part of member

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by E. Douglass in 1912; reposited in the CM, ROM

Collection methods: quarrying, mechanical,

Primary reference: J. S. McIntosh. 1981. Annotated catalogue of the dinosaurs (Reptilia, Archosauria) in the collections of the Carnegie Museum of Natural History. Bulletin of Carnegie Museum of Natural History 18:1-67 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 55350: authorized by Matthew Carrano, entered by Matthew Carrano on 11.10.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

 Saurischia - Piatnitzkysauridae
Marshosaurus bicentesimus Madsen 1976 tetanuran
DNM 343/DINO 16455b = CM 21704