The hydrogeologic framework and structural model of the Rialto-Colton Basin, San Bernardino County, California, was re-evaluated in light of recent studies and the availability of new data. Structural, hydrogeologic framework and textural models of the water-bearing units in the basin were constructed. Gravity, aeromagnetic, and seismic studies were evaluated and IFSAR images were analyzed to confirm or revise previously mapped locations of the faults within and bordering the Rialto-Colton Basin.
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