Early Eocene (Wasatchian) rodent assemblages from the Washakie Basin, Wyoming

Floral change during the Initial Eocene Thermal Maximum in the Powder River Basin, Wyoming

Rapid warming at the beginning of the Eocene (the Initial Eocene Thermal Maximum, or IETM) has been associated with modest changes in floral composition, mostly shifts in the relative abundances of taxa rather than large numbers of first or last appearances. Although floral change across the Paleocene-Eocene transition has been studied in many areas, few fossils demonstrably come from the ∼200 ...

An Early Eocene Oilbird from the Green River Formation of Wyoming (caprimulgiformes : Steatornithidae)

The first diagnostic fossils of an oilbird (Steatornithidae : Caprimulgiformes), two nearly complete skeletons, are described as a new genus and species from the early Eocene Green River Formation of Wyoming. The fossil form is smaller than the living Oilbird (Steatomis caripensis) but had the characteristically shortened tarsometatarsus and distinctive mandibular morphology. The sternum and pe...

Salamander Tracks (ambystomichnus?) from the Cathedral Bluffs Tongue of the Wasatch Formation (eocene), Northeastern Green River Basin, Wyoming

VERTEBRATE TRACKS are comparatively rare in Tertiary deposits of the western United States. Unlike the deposits of the Mesozoic in this region, in which each formation often has several dozen known tracksites, there are only a few known sites in Paleocene units of the region (Lockley and Hunt, 1995), and though the Eocene Green River Formation contains relatively numerous tracks, especially tho...

Some Eocene Dicotyledonous Woods from Eden Valley, Wyoming

Magnetostratigraphy of Late Eocene - Early Oligocene Strata from the CRP-3 Core, Victoria Land Basin, Antarctica

The Cape Roberts Project was successfully completed in the austral spring of 1999 with drilling of the 939.42-m CRP-3 drillhole, located 2-km west of the CRP-2/2A drillhole. The CRP-3 core comprises a 790-m Cenozoic (glacio-) marine sequence separated from underlying Devonian basement rocks by a c. 30-mthick dolerite conglomerate of undetermined age. Here, we present the results of a palaeomagn...