Gravity surveys in the northwestern United States

This report summarizes the Princeton gravity program in the northwestern United States and lists areas being studied in Washington by Z. F. Danes, University of Puget Sound. For a more complete list of gravity surveys and progress in this region the reader should consult the work reported by the U. S. Geological Survey [Hill 1965; Oliver, 1965], the University of Wisconsin [Woollard and Rose, 1963], and the University of Oregon [Berg et al., 1965]. Over 6000 gravity stations have been observed since the Princeton program was initiated in 1955. The goal of the program is to provide reconnaissance gravity data for a study of gravity anomalies and tectonic features of the northwest. The prominent gravity high in the Snake River Plain was found and reported early in the program [Bonini and Lavin, 1957]. Further reports have been made on the progress of this study [Lavin and Bonini, 1957; Biehler and Bonini, 1958; Steinhart et al., 1961; Bonini, 1963].