Where: San Juan County, New Mexico (36.3° N, 108.2° W: paleocoordinates 43.6° N, 85.9° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• Provenance uncertain: originally reported as from the De-na-zin Member of the Kirtland Formation (Lucas and Sullivan), but probably an error (Williamson and Weil 2008)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Reposited in the NMMNH

Collection methods: surface (float),

• ref 29942 suggest specimen actually comes from NMMNH L-4224

Primary reference: S. G. Lucas and R. M. Sullivan. 2000. The sauropod dinosaur Alamosaurus from the Upper Cretaceous of the San Juan Basin, New Mexico. New Mexico Museum of Natural History and Science Bulletin 17:147-156 [J. Head/J. Head/M. Carrano]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 47815: authorized by Jason Head, entered by Jason Head on 02.03.2005

Creative Commons license: CC BY (attribution)