NMMNH Loc. L-1417 (Cretaceous of the United States)

Also known as Little Hatchet Mountains

Where: Grant County, New Mexico (31.9° N, 108.5° W: paleocoordinates 39.4° N, 81.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Middle Member (Ringbone Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lacustrine - large; yellow sandstone and mudstone

• In this interval of Ringbone, the geology is consistent with a transitional depositional setting from deltaic to lacutrine conditions.
• The skeletal remains and impressions are preserved in the middle member within a 0.7-m-thick, buff-colored, trough cross-stratified sandstone. The sandstne exhibis a lenticular geometry and piches out laterally into olive-colored mudstone and siltstone.

Size classes: macrofossils, mesofossils

Preservation: mold/impression, soft parts

Collected by S. Lucas, G. Basabilvazo & Lawton in 1989–1990; reposited in the NMMNH

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

Primary reference: S. G. Lucas, G. Basabilvazo, and T. F. Lawson. 1990. Late Cretaceous dinosaur from the Ringbone Formation, southwestern New Mexico, USA. Cretaceous Research 11:343-349 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 51902: authorized by Matthew Carrano, entered by Kaitlin Maguire on 30.06.2005, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

 Avetheropoda - Tyrannosauridae
Tyrannosauridae indet.2 Osborn 1906 tyrannosaurid
NMMNH P-12997
 Neornithischia - Hadrosauridae
Hadrosauridae indet.1 Cope 1869 hadrosaurid
NMMNH P-2611; incl. skin impressions