Alamosaurus locality, South Dragon Valley (Cretaceous of the United States)

Also known as 1939 Smithsonian Expedition, North Horn Mountain, Sauropod Locality

Where: Emery County, Utah (39.2° N, 111.3° W: paleocoordinates 47.2° N, 87.8° W)

• coordinate stated in text

• small collection-level geographic resolution

When: North Horn Formation, Maastrichtian (72.1 - 66.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by C. Gilmore in 1939; reposited in the USNM

Collection methods: quarrying, mechanical,

Primary reference: C. W. Gilmore. 1946. Reptilian fauna of the North Horn Formation of central Utah. United States Department of the Interior Geological Survey Professional Paper 210-C:29-53 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 45722: authorized by Matthew Carrano, entered by Matthew Carrano on 29.11.2004, edited by Albert Garcia Selles

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
  - Prismatoolithidae
Prismatoolithus jenseni n. sp. Bray 1999 dinosaur
BYU 9481, UCM 73464, HEC 437, HEC 767-4,5; eggs and eggshels
 Saurischia -
Alamosaurus sanjuanensis Gilmore 1922 sauropod
 Saurischia - Elongatoolithidae
Spongioolithus hirschi Bray 1999 theropod
HEC 762-1, 13 fragments; HEC 763, 6 fragments
 Neornithischia - Ovaloolithidae
Ovaloolithus utahensis Bray 1999 bird foot dinosaur
HEC 767-6, HEC 764-1