A time-domain electromagnetic (TDEM) sounding survey was carried out on the western basin-range boundary of Smith Creek Valley, Nevada. The survey achieved its goal of mapping depth to volcanic basement along five traverses that crossed the boundary. In addition to mapping the electrical basement, the TDEM survey outlined significant cross faulting within the alluvium. Seventy five soundings were made over a five day period using a Geonics EM37 system that shows the usefulness and effectiveness of the TDEM technique to determine depth to electrical basement under heterogeneous range-front alluvium.

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