Grand Teton Np Report
Abstract
Stratigraphic distributions and geographic variation of small mammals, principally Miocene in age, are being studied. The aim is to help construct a biostratigraphic framework that covers the north-central Rockies, as well as to clarify the importance of large mountain ranges as biogeographic barriers for small mammals. Principal goals of the 1981 field season, which was part of a longer-term project (Barnosky, 1980), included detailed measurement of stratigraphic sections and collection of Neogene mammals in Jackson Hole, Wyoming. A secondary goal was field study of Tertiary sediments in nearby intermontane basins in order to understand the regional character of sedimentation.