Rockwood was aware of O. M. Wozencraft's earlier attempts to promote a scheme to irrigate the Salton Sink.
A large lake, Lake Cahuilla, existed in the area from about 20,500 to 3,000 years ago and left evidence as wave cut benches on the higher portions of the Salton Buttes.
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The Gulf of California Rift Zone (GCRZ) is the northernmost extension of the East Pacific Rise which extends some 1300 km from the mouth of the Gulf of California to the southern terminus of the San Andreas Fault at the Salton Sink.