Gravity Studies in the Cascade Range

Abstract

We have compiled a compatible set of gravity data for the entire Cascade Range. From this data set we prepared a series of interpretive color gravity maps including a free air anomaly map, Bouguer anomaly map at a principle and an alternate reduction density, and filtered and derivative versions of the Bouguer anomaly map. The set is accompanied by a color terrain map at the same scale. The regional anomaly pattern and gradients outline the various geological provinces adjacent to the Cascade Range and delineate major structural elements in that range. The more local anomalies and gradients may delineate low density basin and caldera fill, faults, and shallow platforms.