Ground Gravity Survey At Valles Caldera - Redondo Area (Wilt & Haar, 1986)

A computer program capable of two-dimensional modeling of gravity data was used in interpreting gravity observations along profiles A--A' and B--B' (Talwani et al., 1959). Densities of 2.12, 2.40, and 2.65 g/cm a were used for modeling the near-surface caldera fill, the underlying volcanics, and the basement sections, respectively (Fig. 8). Although correlation with well data was done whenever possible, there is some uncertainty to the model because of the nonuniqueness inherent in gravity interpretation. The model is meant as a general guide to subsurface structure, and is useful for identifying large-scale changes.

• Michael Wilt, Stephen Vonder Haar (1986) A Geological And Geophysical Appraisal Of The Baca Geothermal Field, Valles Caldera, New Mexico