Plate 19 Cmpr
SOUTH PASS 1:100,000 SCALE GEOLOGIC MAP Wyoming State Geological Survey Map Series 70 Prepared in cooperation with the U.S. Geological Survey 2004 STATEMAP Grant award # 04HQAG0045 July 28, 2005 Wayne M. Sutherland and W. Dan Hausel INTRODUCTION The South Pass (1:100,000) quadrangle is located at the southern end of the Wind River Mountains, and includes part of the Red Desert, the Great Divide Basin, and the northeastern corner of the Green River Basin, Wyoming. The map encloses the community of Atlantic City, and the historic gold mining communities of South Pass City and Lewiston. The major drainage across the northern part of the map is the eastward-flowing Sweetwater River, and small streams flow westward toward the Green River from the far western part of the map area. The southern half of the map area drains southward into the Great Divide Basin, which is enclosed by the high ground of the continental divide. Thirty-two 1:24,000 quadrangles that comprise the South Pass 1:100,000 scale map are listed as follows: Atlantic City, Anderson Ridge, Barras Springs, Buffalo Hump Basin, Bush Lake, Circle Bar Lake, Continental Peak, Cyclone Draw, Dickie Springs, Eagles Nest Draw, Five Fingers Butte, Five Fingers Butte NE, Freighter Gap, Happy Spring, Joe Hay Rim, John Hay Reservoir, Lewiston Lakes, Lost Creek Lake, Lost Creek Reservoir, Luman Rim, Monument Ridge, Olson Springs, Osborne Draw, Pacific Springs, Picket Lake, Radium Springs, Rock Cabin Spring, Soap Holes, South Pass City, Sulphur Bar Spring, The Pinnacles. ECONOMIC GEOLOGY Gold was discovered within the Lewiston district of the South Pass granite-greenstone belt in 1842.
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