Abstract Numerous 40Ar/39Ar experiments on sanidine and biotite from 22 ash beds and 3
volcaniclastic sand beds from the Greater Green River, Piceance Creek, and Uinta Basins of …

Ismael Ferrusquia-Villafranca, and Malcolm C. McKenna been recovered from rocks referred
to the upper part of the Cathedral Bluffs Tongue of the Wasatch Formation, and Uintan …

The incorporation of research tools and analytical approaches from the geospatial sciences
is a welcome trend for the study of primate and human evolution. The use of remote sensing …

Biochronological zones for the late Wasatchian, Bridgerian, and Uintan North American
Land Mammal Ages are formally defined in this paper. These zones include Wasatchian …

We present new fossil records of the geoemydid turtle Bridgeremys pusilla from the Uinta
Formation of Utah. Turtles are abundant throughout the unit, and known taxa are similar to …

Abstract Geographic Information Systems (GIS) comprise a powerful set of tools designed for
the storage, retrieval, mapping, and analysis of geographic data. In GIS, all spatial data are …

There has been great interest in the global warming events that heralded the onset of the
Eocene and particularly the response of mammalian faunas to these events. However, little …

In the middle Eocene, multiple lineages of North American omomyoids independently
evolved body masses greater than 500 g. Most of these large-bodied omomyoids are known …

We described newly discovered baenid specimens from the Uintan North American Land
Mammal Age (NALMA), in the Uinta Formation, Uinta Basin, Utah. These specimens include …

An edentulous partial skeleton of a carnivorous mammal from the Uinta Formation (middle
Eocene) of Utah is referred to the rare and enigmatic sabre-tooth clade Machaeroidinae …