Barrel Springs arroyo (UNM V-143) (Cretaceous of the United States)

Also known as Alamosaurus type site, Bauer 67, NMMNH Loc. L-4225

Where: San Juan County, New Mexico (36.3° N, 108.0° W: paleocoordinates 43.6° N, 85.7° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Naashoibito Member (Ojo Alamo Formation), Lancian (70.6 - 66.0 Ma)

• from lower part of layer at this site

• bed-level stratigraphic resolution

Environment/lithology: "channel"; concretionary, brown, white, conglomeratic sandstone

• "Sandstone, soft white, conglomeratic; contains brown concretions"

Size classes: macrofossils, mesofossils

Collected by C. Gilmore, J. Reeside, C. H. Sternberg in 1916, 1921-1922; reposited in the USNM

Collection methods: quarrying, surface (float), surface (in situ), mechanical,

• original collection by Gilmore in 1916, followed by main collecting by J. B. Reeside, Jr., June 1921 and additional specimens collected by C. H. Sternberg in 1922; specimens found about 200 ft apart and may represent one individual

Primary reference: C. W. Gilmore. 1921. Discovery of sauropod dinosaur remains in the Upper Cretaceous of New Mexico. Science 54(1395):274 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 46992: authorized by Matthew Carrano, entered by Matthew Carrano on 28.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

 Testudines -
Testudines indet. Batsch 1788 turtle
incl. Sternberg's #49
 Saurischia -
Alamosaurus sanjuanensis n. gen. n. sp.
Alamosaurus sanjuanensis n. gen. n. sp. Gilmore 1922 sauropod
USNM 10486, 10487; UNM FKK-029 (=NMMNH P-29725), NMMNH P-29726
 Theropoda -
Theropoda indet. theropod
teeth; incl. back of skull & pelvis, Sternberg's #50, 51
 Ornithischia -
Ankylosauria indet. ornithischian
"dermal plates of an armored form"
 Neornithischia -
Ceratopsia indet. ornithischian
 Loricata -
Crocodylia indet. crocodilian