As Nevada’s state geological survey, the creation of map services and datasets have been an important part of our modernization and organization. Many of these datasets are freely available, and in an effort to better disseminate these data, we have created an Open Data site for the public to search and download GIS data. This platform will eventually replace the existing Maps & Data page on the NBMG website. The NBMG Open Data site also contains links to web applications, publications, additional resources, and other GIS data freely available throughout the state (e.g., NDOM, NSL, NDEP, BLM, NDOW, County etc.—where available). NBMG GIS datasets can be searched for and downloaded within this new platform. Datasets can be downloaded as CSV files, KML, or ESRI shapefiles. We invite you to explore the NBMG Open Data site here: https://data-nbmg.opendata.arcgis.com/
We are working to make our datasets more easily accessible to the public, contractors, and companies alike in the attempt to further collaboration and scientific research. This Open Data site will help us distribute and share these freely available datasets. Please note that we are also working to catalog and expand our network of freely available datasets including geothermal data, DEMs, air photos and imagery, and geologic data (including fault and earthquake data). Please be patient as we work to grow and distribute these data. As we move forward, this Open Data site will always reflect the most current data we have at NBMG.
If you have questions regarding this new platform, please contact NBMG at firstname.lastname@example.org. We will also be presenting the Open Data site at the NBMG Advisory Board meeting on August 17, 2017.
Geothermal Activity Book (Grades 4–8)—Updated Version Available
This fun activity book for grades 4–8 has been updated by the Nevada Division of Minerals.
Geothermal Resources in Nevada: Activity Book 2015
Ph.D. Dissertation Defense—August 10: Chad W. Carlson (Advisor Jim Faulds)
A Message from Marie Russell (Department of Geological Sciences and Engineering): “You are invited to attend PhD candidate Chad Carlson’s dissertation defense on Thursday, August 10, 2017. The Defense will be held in DMS 105, at 2:00 PM.”
Kinematics and Transfer Mechanisms of Strain Accommodation at the Transition between the Northern and Central Walker Lane, Western Nevada
Dissertation Author: Chad Carlson
The Walker Lane is a relatively young and developing tectonic intraplate boundary, where ~20% of the dextral motion between the Pacific and North American plates is accommodated. Paralleling the more discrete, well-developed, and through-going San Andreas fault system to the west, the Walker Lane consists of discontinuous structural domains characterized by systems of dextral, sinistral, and normal faults. The manner in which some these disparate fault systems accommodate and transfer dextral strain remain enigmatic and are relatively understudied. Also, it has been suggested that the Walker Lane will eventually mature and take over as the principal tectonic boundary between the Pacific and North American plates in the future. As such, the Walker Lane provides a natural laboratory to examine the early development of a major tectonic plate boundary.
At the transition between the central and northern Walker Lane, all three characteristic types of Walker Lane structural domains reside, share boundaries, and have been documented to accommodate regional dextral shear. In the central Walker Lane (Walker Lake structural domain), northwest-striking dextral faults accommodate northwest translation of crustal blocks. Northwest of these dextral faults, east-northeast-striking sinistral faults and oroclinal flexure in the southern part of the northern Walker Lane (Carson structural domain) accommodate clockwise, vertical-axis rotation of sinistral fault-bounded blocks. A region of northerly-striking normal faults and asymmetric basins resides west of the central Walker Lane and south of the northern Walker Lane, where geodetic studies define northwest-directed dextral strain devoid of major strike-slip fault systems. Combined, these regions act in concert to accommodate dextral shear at the latitudes of the central-northern Walker Lane transition. The purpose of this research was to elucidate the kinematics and transfer mechanisms of regional dextral shear accommodation among and between disparate styles of deformation. To accomplish this, geologic mapping of key regions and paleomagnetic study of Tertiary volcanic rocks were conducted.
Preliminary Geologic Map of the Truckee Range, Black Warrior Geothermal Area, Washoe and Churchill Counties, Nevada
Authors: Andrew J. Sadowski and James E. Faulds
Series: Open-File Report 2016-07
Version: first edition, July 2017
Format: map: 40 x 30 inches, color, cross sections; text: 12 pages, color
The Black Warrior geothermal system lies 20 km east of the southern end of Pyramid Lake in the Truckee Range of northwestern Nevada. It is an amagmatic blind geothermal system, lacking hydrothermal surface manifestations (no fumaroles, hot springs, sinter deposits, or high temperature alteration) and also lacks recent (<5 Ma) volcanism. The system was discovered through temperature gradient drilling (100–600 m depth) by Phillips Petroleum Company in the 1980s (Sass et al., 1999). The Black Warrior area, synonymous with the North Valley prospect, exhibits a maximum observed temperature of ~128°C at 552 m surrounded by elevated temperature gradients (figure 2). Also, a weak shallow anomaly was observed with a 2-m temperature survey circa 2009 (Kratt, personal communication).
The 1:24,000-scale geologic map of the Black Warrior geothermal area showcases the results of detailed stratigraphic and structural analyses. The map focuses on the Truckee Range in northwestern Nevada and covers portions of four adjoining 7.5-minute quadrangles: Black Warrior Peak, Russell Peak, Nixon, and Juniper Peak. The detailed map was produced to evaluate the structural controls of the Black Warrior geothermal system and overall geothermal potential of the area (Sadowski and Faulds, 2015; Sadowski, 2016).
Ultimately, the structural relationships at Black Warrior may help to guide exploration efforts for other blind geothermal systems in the Great Basin region and other extensional settings.
This map was prepared with support from the Great Basin Center for Geothermal Energy, the U.S. Department of Energy, Nevada Petroleum and Geothermal Society, American Association of Petroleum Geologists, and Geological Society of America.
Geology and Geophysics of White Pine and Lincoln Counties, Nevada, and Adjacent Parts of Nevada and Utah: The Geologic Framework of Regional Groundwater Flow Systems
Authors: Peter D. Rowley, Gary L. Dixon, Edward A. Mankinen, Keith T. Pari, Darcy K. McPhee, Edwin H. McKee, Andrew G. Burns, James M. Watrus, E. Bartlett Ekren, William G. Patrick, and Judith M. Brandt
Series: Report 56
Format: text: 146 pages; 4 plates: color, with cross sections
This report describes the geologic framework of a >65,000 km2 area that straddles the Nevada-Utah border. The studied region includes most of White Pine and Lincoln counties and adjacent counties in eastern Nevada, as well as parts of Tooele, Juab, Millard, Beaver, and Iron counties in western Utah. This study represents more than a 20-year effort by the Southern Nevada Water Authority (SNWA) to understand the groundwater resources of this part of the Great Basin. This first step, which includes a compilation of all the information on the geologic and geophysical setting, was necessary for hydrological and biological investigations. To understand the geologic framework, we compiled all known geologic mapping at a scale of 1:250,000, and constructed 25 geologic cross sections at the same scale. We also present new geophysical data, consisting of gravity surveys and audiomagnetotelluric (AMT) profiles, plus assembly of available aeromagnetic data, contracted from the U.S. Geological Survey (USGS), as well as additional AMT profiles by the SNWA. This report focuses on two large regional groundwater flow systems: the White River and Great Salt Lake Desert systems. Although the map boundaries presented here bound these aforementioned flow systems, the maps, cross sections, and text are intended to serve as a modern multidisciplinary regional geological and geophysical review, comparable to many old county reports in Nevada and Utah.
View the geospatial PDFs for the four plates that accompany this report:
Plate 1—Geologic map of the northern part of the study area, Nevada and Utah
Plate 2—Geologic map of the southern part of the study area, Nevada and Arizona
Plate 3—Geologic cross sections of the northern part of the study area, Nevada and Utah
Plate 4—Geologic cross sections of the southern part of the study area, Nevada and Arizona
GIS files for these plates will be available soon.
This report was prepared with support from the Southern Nevada Water Authority.
“This report is dedicated to Gary L. Dixon, who died at age 73 from cancer on January 14, 2017 as the manuscript was being reviewed and edited. Gary, a great field geologist, led the 20-year study presented here through the strength of his competence and personality. He began the study when he was a Geologist with the U.S. Geological Survey. After retirement, he continued with it as a consulting geologist. Perhaps more important to his coauthors and many others, we loved Gary and can attribute major parts of our careers to mentorship by him and to collaboration with him. To his wife, Wendy Dixon, and his children, Chris Dixon and Natalie Dixon Pique, he was a loving husband and father and a loyal friend to them and most others he met. His passions were geology, golf, and supporting Wendy’s equally extraordinary career with the U.S. Department of Energy. All of us miss him.” (Report 56)
Geology and evolution of the McDermitt caldera, northern Nevada and southeastern Oregon, western USA
by Christopher D. Henry, Stephen B. Castor, William A. Starkel, Ben S. Ellis, John A. Wolff, Joseph A. Laravie, William C. McIntosh, and Matthew T. Heizler
Geosphere; v. 13, no. 4
Published: July 2017
The McDermitt caldera (western USA) is commonly considered the point of origin of the Yellowstone hotspot, yet until now no geologic map existed of the caldera and its geology and development were incompletely documented. We developed a comprehensive geologic framework through detailed and reconnaissance geologic mapping, extensive petrographic and chemical analysis, and high-precision 40Ar/39Ar dating. The caldera formed during eruption of the 16.39 ± 0.02 Ma (n = 3) McDermitt Tuff (named here), which is strongly zoned from peralkaline, aphyric, high-Si rhyolite (comendite) to metaluminous, abundantly anorthoclase-phyric, trachydacite, or Fe-rich andesite (icelandite).
We are hiring! Please see the following link and share with those who may be interested in applying:
This is primarily a GIS-based and Web GIS-based position that will be responsible for producing high-quality maps, data, reports, posters, figures, and other products and will assist in the development/maintenance of web services, maps, and applications. The position will provide services and expertise in the areas of GIS, cartography, graphic design, publications, and web to faculty, staff, students, and clients as well as other duties as assigned.
Applicants with the following experience are encouraged to apply: ESRI ArcGIS Desktop software and extensions, geodatabase management for map production, map/data conversion processes from legacy formats to GIS formats, metadata preparation, web services creation using ArcGIS Server, web applications development, web programming languages, desktop publishing software, background in geology.