Where: Guanajuato, Mexico (21.2° N, 100.7° W: paleocoordinates 21.3° N, 100.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Rancho Viejo Beds Formation, Blancan (4.9 - 1.8 Ma)

• an ash immediately underlying the fauna has an Ar/Ar date of 4.74 +/- 0.14 Ma (Flynn et al. 2005)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial

Collected by O. Carranza-Castañeda

Primary reference: O. Carranza-Castaneda. 1989. Rinocerontes de la fauna local Rancho el Ocote, Mioceno Tardio (Hemfiliano tardio) de estado de Guanajuato. Universidad Nacional Autónoma de México, Instituto de Geológia, Revista, Publicación Especial 8(1):88-99 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 20076: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Grace Varnham and Jill Wertheim

Creative Commons license: CC BY (attribution)