Pleistocene Lake Bonneville was the most prominent feature of the eastern Great Basin during much of the Late Pleistocene. During lake high stands, a variety of sedimentological and geomorphic features formed in response to circulation, river runoff, and wave action. These features fall into three basic categories. (1) Common shoreline features such as drift-aligned sand and gravel bodies such as baymouth barriers and spits (e.g., the Stockton bar), cuspate barriers (e.g., Point of the Mountain), tombolos, and sand delta terraces that prograded basinward during the regression of Lake Bonneville. (2) Unusual "dumps" of Gilbert-type delta sediments (e.g., Big Cottonwood Canyon gravels) which can be laterally extensive. (3) Marls, and other fine-grained offshore facies with some sediments reworked during lower lake levels. Understanding the genetic mechanisms operative during formation of these deposits has important engineering implications. For instance, liquefaction potential of the offshore facies is directly related to the relative amount of coarse-grained sediment supplied by rivers which in turn is a function of runoff intensity and sediment dispersal by lake currents. Numerical modeling studies of Lake Bonneville are being used to establish relationships between the field features of the lake and specific hydrodynamic characteristics which in turn are a function of Late Pleistocene climate forcings in the Great Basin. These studies have the potential for predicting a number of features of interest to engineering geologists working in the Bonneville basin.

Along the eastern margin of the Basin and Range province, the Wasatch Front of Utah is replete with geoantiquities, including Lake Bonneville deltas, spits and bars, glacial moraines, alluvial fans and debris flows, fluvial terraces, fault scarps, modern lakeshores, playas, and salt flats. These features are situated in a region where current and anticipated population growth rates are double the national average. Geoantiquties of this area are well positioned to chronicle the evolution of the pre-urban landscape, but are poorly positioned to withstand the impacts of urbanization.

We are using geographic information systems (GIS) to integrate inventories of geoantiquties and models of Wasatch Front urban growth in order to plan mitigation, scientific investigation, education, information transfer, and conservation. Partnerships with government agencies, educational institutions, non-governmental organizations, public interest groups, and committed individuals provide pathways to raise awareness and produce broad involvement in planning, and participation in implementing geoantiquities resource management.