Since the previous report [Bonini, 1965] the Princeton gravity program has been directed mostly toward detailed studies to aid in the solution of specific geologic problems. Some stations have been observed, however, purely to fill in blank areas as a contribution to the preparation of state maps. Worden meter W-57 was used before 1966 and LaCoste-Romberg instruments were used in 1966 and later.
Figure 1 identifies by numbers the areas covered by specific projects, summarized below, for which some preliminary unpublished interpretations are presented. Area 1 covers the Teton Range and Jackson Hole, Wyoming, where Princeton gravity data have been incorporated with additional gravity, seismic-refraction, and aeromagnetic data into a comprehensive report [Behrendt et al., 1968]. Similarly, the gravity map and interpretation of area 2, the Boulder batholith of Montana, have been published [Biehler and Bonini, 1969].
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