Four new publications now available at NBMG: two hazards-related reports and two geologic maps

Open-File Report 13-3 – Flood Hazards


Updated assessment and vulnerability to flood hazards in Nevada, by Irene M. Seelye, Gary L. Johnson, Jonathan G. Price, and Jordan Hastings, 2013

OF13-3, 8 pages, color, with 119 external links

Supersedes Open-File Reports 07-2 and 10-3

Available only on the Web:

Open-File Report 13-7 – Earthquakes


Magnitude values used for M≥6 earthquakes in Earthquakes in Nevada: 1840s to 2010, NBMG Map 179, by Craig dePolo, 2013

This report details the basis for the magnitude values used for magnitude 6 and larger earthquakes in the recent earthquake map of Nevada, Map 179. A table comparing several estimates of the magnitudes of these events is included.

OF13-7, 6 pages, b/w, folded or rolled, $1.80

Available on the Web:

See also Map 179:

Open-File Report 13-8 – Wabuska


Preliminary geologic map of the Wabuska quadrangle, Lyon County, Nevada, by Nicholas H. Hinz, Alan R. Ramelli, and James E. Faulds, 2013

A 1:24,000-scale, color preliminary geologic map of the Wabuska 7.5-minute quadrangle in Lyon County, Nevada. The bedrock exposures in this quadrangle consist of Mesozoic and Tertiary volcanic and sedimentary rocks. The Mesozoic section includes locally fossiliferous Late Triassic Limestone that conformably overlies Late to Early Triassic volcanic and volcaniclastic strata. The Tertiary section includes late Oligocene ash-flow tuffs and a complex middle to late Miocene section of lavas, intrusions, and sedimentary rocks. The Tertiary section is cut by a system primarily down-to-the-east northeast-striking normal faults and is locally folded along north-northeast-trending synextensional synclines and anticlines. Principal surficial deposits include late Pliocene to modern alluvial fan deposits, late Quaternary lacustrine deposits of pluvial Lake Lahontan, and late Quaternary eolian deposits. The Wabuska fault zone cuts across the quadrangle along the southern edge of the Desert Mountains and consists of a system of right-stepping, ENE-striking, strike-slip and oblique-slip faults. Quaternary fault scarps were mapped along segments of the Wabuska fault zone and along several northeast-striking fault zones in the northwest quarter of the quadrangle. This quadrangle also includes the Wabuska power plant–Nevada’s first geothermal power plant, and the natural gas-powered, Fort Churchill General Station.

This map was prepared as part of the STATEMAP component of the National Cooperative Geologic Mapping Program, in cooperation with the U.S. Geological Survey and with support from the Department of Energy.

OF13-8, one color plate, 40×27 inches, scale 1:24,000; includes cross sections, $15.00

Available on the Web:

Open-File Report 13-9 – West Gate


Preliminary geologic map of the West Gate quadrangle, Churchill County, Nevada, by Christopher D. Henry, John W. Bell, David A. John, and Joseph P. Colgan, 2013

A 1:24,000-scale, color preliminary geologic map of the West Gate 7.5-minute quadrangle in Churchill County, Nevada with descriptions of 49 geologic units. Accompanying text includes full unit descriptions and references. Rocks exposed in the quadrangle include highly deformed and variably metamorphosed Triassic and Jurassic sedimentary rocks, thick sections of 29 to 25 Ma ash-flow tuffs that accumulated in one or more large calderas, and middle Miocene sedimentary rocks that record the beginning of regional extension. The map also shows the complex faults and other structures that resulted from middle Miocene to present extension, including long stretches of fault scarps generated by the 1954 Fairview Peak and Dixie Valley earthquakes.

This map was prepared as part of the STATEMAP component of the National Cooperative Geologic Mapping Program, in cooperation with the U.S. Geological Survey.

OF13-9, one color plate, 40.5×28 inches, scale 1:24,000; 7-page text, b/w, $18.00

Available on the Web:

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