Clark County – four new geologic maps

Map 181: Geologic map of the Devils Throat quadrangle and Clark County, Nevada
by L. Sue Beard and David J. Campagna
2012

M181

A 1:24,000-scale, color geologic map of the Devils Throat 7.5-minute quadrangle in Clark County, Nevada with descriptions of 38 geologic units and two cross sections. Accompanying text includes full unit descriptions and references. This quadrangle includes a scenic part of Clark County that is transected by the popular Bureau of Land Management Gold Butte Back Country Byway. It contains several sinkholes, the largest of which is called Devils Throat, and several Quaternary faults. The western part exposes a large fold and thrust involving colorful Mesozoic clastic rocks that are overthrust by Paleozoic carbonate rocks.

28.5 x 33 inches, color, scale 1:24,000; 9-page text, color; folded or rolled, $19.00 or free on the Web with GIS zip file: http://www.nbmg.unr.edu/sales/pbsdtls.php?sku=M181

 

Open-File Report 12-7: Preliminary geologic map of the Corn Creek Springs NW quadrangle, Clark County, Nevada
by Alan R. Ramelli, William R. Page, Craig R. Manker, and Kathleen B. Springer
2012

OF127

29 x 28 inches, color, scale 1:24,000; folded or rolled, $15.00 or free on the Web: http://www.nbmg.unr.edu/sales/pbsdtls.php?sku=OF12-%207

 

Open-File Report 12-8: Preliminary geologic map of the north half of the Fourth of July Mountain quadrangle, Clark County, Nevada
by Nicholas H. Hinz, James E. Faulds, and Alan R. Ramelli
2012

OF128

A 1:24,000 scale, preliminary geologic map of the north half of the Fourth of July Mountain 7.5-minute quadrangle in southern Clark County, Nevada. This quadrangle contains the middle and upper parts of the Searchlight pluton and numerous veins and dikes related to mineralization in the Searchlight area. In fact, it may contain the eastern part of the Quartette Vein, the largest producing gold mine in the Searchlight area, but displaced eastward by faulting. Furthermore, the area contains some of the most spectacular scenery in southern Nevada, with the eastern part of the map area lying within the Lake Mead National Recreation Area.

This new Open-File Report 12-8 supersedes the northern portion only of Open-File Report 98-7. See Open-File Report 98-7 for geology of the SW 1/4 of the quadrangle and cross sections.

37 x 28 inches, color, scale 1:24,000; folded or rolled, $16.00 or free on the Web: http://www.nbmg.unr.edu/sales/pbsdtls.php?sku=OF12-%208

 

Open-File Report 12-9: Preliminary geologic map of the Ireteba Peaks quadrangle, Clark County, Nevada
by Nicholas H. Hinz, James E. Faulds, Alan R. Ramelli, and Heather L. Green
2012

OF129

A 1:24,000 scale, preliminary geologic map of the Ireteba Peaks 7.5-minute quadrangle in southern Clark County, Nevada. The quadrangle exposes a steeply tilted, cross-sectional view of a ~16–17 Ma large volcanic complex, including plutonic roots, hypabyssal dike swarms, and parts of a stratovolcano. Most of the rocks in the eastern half of the quadrangle are ductilely deformed, intruded by multiple episodes of Miocene dikes, and cut by low- and high-angle normal faults, including the Dupont Mountain detachment fault. The cross-sectional view of the volcanic complex provides critical clues to understanding the relations between regional extension and magmatism. The quadrangle also includes significantly mineralized areas near Rockefeller Mine along and near the detachment fault. This mineralization may be related to mineralization in the Searchlight area. Furthermore, the area contains some of the most spectacular scenery in southern Nevada, with the eastern part of the quadrangle lying within the Lake Mead National Recreation Area.

This new map supersedes Open-File Report 09-4.

45.5 x 27 inches, color, scale 1:24,000; folded or rolled, $18.00 or free on the Web: http://www.nbmg.unr.edu/sales/pbsdtls.php?sku=OF12-%209

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