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New!  Surficial geologic map of the Walker Lake Area, Mineral County, Nevada
Surficial geologic map of the Walker Lake Area, Mineral County, Nevada
 
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Title Surficial geologic map of the Walker Lake Area, Mineral County, Nevada

Author: Kenneth D. Adams
Year: 2026
Series: Open-file Reports
Version: 2026-02
Format: 1 plate, 35.5" x 52.5", text, 6 pages
Scale: 1:48,000

Walker Lake lies in a closed basin at the end of the Walker River, where water levels have been fluctuating for probably over 1 million years (Morrison, 1991; Reheis et al., 2002, 2003). In the latest Pleistocene (~15.5 ka), the basin was occupied by the southernmost arm of Lake Lahontan that reached an elevation of about 1,331 m (Adams and Wesnousky, 1998; Adams et al., 1999). After Lake Lahontan receded, there is scant evidence that a lake occupied the basin during much of the Holocene until about 3.6 ka when a lake rose to about 1,262 m (Adams and Rhodes, 2019). Over the ensuing several thousand years, lake levels fell and rose several times, creating a suite of late Holocene shorelines found between about 1,262 m and 1,252 m. More recently, the historical highstand of Walker Lake at about 1,252 m was achieved in AD 1868 (Adams, 2007). The basinwide extent of each of these dated shorelines provides horizontal chronostratigraphic markers that were used to define the ages of different alluvial fans through detailed mapping (1:5,000-scale) of the crosscutting relationships between alluvial fans and shorelines. The mapping is presented here at a scale of 1:48,000 to provide a basinwide overview.

Suggested Citation: Adams, K.D., 2026, Surficial geologic map of the Walker Lake area, Mineral County, Nevada: Nevada Bureau of Mines and Geology Open-File Report 2026-02, scale 1:48,000, 6 p.

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Original Product Code: OF2026-02