White Mesa Mine Fissure 1 (Pleistocene of the United States)

Also known as NMMNH L-6112

Where: Sandoval County, New Mexico (35.5° N, 106.8° W: paleocoordinates 35.5° N, 106.8° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Late/Upper Pleistocene (0.1 - 0.0 Ma)

• a Camelops metacarpal from Fissure 1 is dated at "12,910 +/- 60 14C yrs B.P." (AMS on collagen)

• group of beds-level stratigraphic resolution

Environment/lithology: fissure fill; poorly lithified, gypsiferous, silty sandstone

• "fissure-fill"
• "poorly brecciated fragments of gypsum in a matrix of poorly consolidated, silty, fine- to medium-grained gyspum sandstone with sparse quartz grains... Some stratification is evident, with beds that are more or less sandy showing lateral continuity"

Size class: macrofossils

Collected by D. Pino, L. Pino, G. S. Morgan, L. F. Rinehart in 2005; reposited in the NMMNH

Collection methods: salvage, quarrying,

• fossils were discovered "During the removal of gypsum with heavy machinery" and "plaster jacketed" for collection

Primary reference: G. S. Morgan and L. F. Rinehart. 2007. Late Pleistocene (Rancholabrean) mammals from fissure deposits in the Jurassic Todilto Formation, White Mesa mine, Sandoval County, north-central New Mexico. New Mexico Geology 29(2):39-51 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 79653: authorized by John Alroy, entered by John Alroy on 17.03.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Ungulata - Camelidae
Camelops hesternus Leidy 1873 camel
 Ungulata - Bovidae
Bison antiquus Leidy 1852 bison