Abstract

The Lahontan Basin of western Nevada was influenced by geomorphic changes in river channels that produced interbasin diversions of surface drainage. Adrian Valley contains evidence of drainage diversion from the Walker River Basin to the Carson River Basin. Paleochannel evidence from both Adrian and Mason Valley, hydrological modeling, and Pleistocene shoreline evidence in the Walker Lake Basin indicate that: (1) the Adrian Valley is a Holocene abandoned channel of the Walker River, and (2) the valley was formed by lake overflow from the Walker subbasin of Pleistocene Lake Lahontan. A provisional six-stage history of Adrian Valley is presented. [Key words: geomorphology, Quaternary, Pleistocene Lake Lahontan, abandoned river channels, Great Basin.]

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