BLM Job Announcement

Message from BLM: We are pleased to announce a new, exciting position available at BLM – BUREAU OF LAND MANAGEMENT.   It is our hope that qualified, career oriented individuals at your organization or other professionals known to you will actively consider this position and apply accordingly.  Efforts on your part to disseminate this information are greatly appreciated.

Position Information:
Job Description:  Engineering Technician (Civil);
Announcement Number:  MT-DEU-2016-0018;
Location(s) of position:  Malta, MT, US;
Salary:  $31,944 – $62,920;
Applications will be accepted until:  12/02/2015.

For additional information on this job posting, please click here.

Preliminary Geologic Map of the South Kinsley Mountains, Elko and White Pine Counties, Nevada

John L. Muntean, Tyler J. Hill, Randall L. Hannink, Moira Smith, Ken Raabe, and Peter Shabestari
Year: 2015
Series: Open-File Report 15-9
Format: plate: 33 x 32 inches, color, includes 1 cross section; text: 3 pages, b/w
Scale: 1:12,000

This detailed geologic mapping of the southern Kinsley Mountains in eastern Nevada investigates the time-space relationships between an Eocene intrusive complex centered on a granitic stock, proximal intrusion-related polymetallic skarn and carbonate replacement mineralization, disseminated Carlin-style gold deposits 3 km north of the stock, faulting, and Eocene magmatism. Pilot Gold is currently exploring for more Carlin-style mineralization in the center of the range, just north of the completed map.

The mapping revealed the following:

1) A significant amount of extensional faulting occurred prior to Eocene magmatism and mineralization, similar to what NBMG mapping documented recently in the Eureka district. Eocene intrusions cut faults or fill faults.
2) Eocene dikes, gossans, and quartz veins, and jasperoid formation were focused within a 1-km-wide corridor that extends 3 km northward from the stock to the area of gold deposits, where dikes in drill core have locally high gold grades.
3) Significant Eocene extension is demonstrated by a southeast-dipping fault that dropped Permian rocks against metamorphosed and mineralized Cambrian rocks proximal to the Eocene stock. The fault is overlapped by Eocene volcanic rocks that are a few million years younger than the stock, suggesting the intrusive complex was rapidly exhumed nearly 3 km. Mapping of the southern end of the range is the first half of a project to meld the mapping with Pilot Gold’s mapping of the northern half of the range to complete a map of the entire Kinsley Mountains.

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

View or purchase here:

Preliminary Geologic Map of the Pequop Summit Quadrangle, Elko County, Nevada


Christopher D. Henry and Charles H. Thorman
Year: 2015
Series: Open-File Report 15-8
Format: plate: 41 x 29 inches, color, includes 3 cross sections; text: 12 pages, b/w
Scale: 1:24,000

The Pequop Summit 7.5-minute quadrangle covers the northern Pequop Mountains and is just north of newly recognized Carlin-type gold deposits in a geographic and geologic setting distinct from those of long-known deposits to the west. Mapping was done from Summer 2014 to Summer 2015; digital cartography, cross sections, and unit descriptions were done in Fall to Summer, 2014–2015.

Major results of this work are as follows:

1) The map area contains a >5-km-thick section of Cambrian through Permian sedimentary rocks. A major unconformity between Permian and Mississippian rocks documents an episode of uplift and erosion in the Late Pennsylvanian.
2) All Paleozoic rocks were contractionally deformed and metamorphosed during the Mesozoic. Contraction was accomplished by a combination of thrust and attenuation faults; west-northwest-striking, probable tear faults; folding within less competent units; and intense brecciation of competent units.
3) Eocene igneous rocks include locally derived andesite-dacite lavas and rhyolite intrusions that are geochemically unrelated to the lavas but may have been the heat source for the Carlin deposits.
4) Cenozoic extension includes a middle Miocene pulse of ~40° east-tilting along west-dipping normal faults in the central and southern Pequop Mountains and modern faulting along range-bounding faults.
5) The northern Pequops are west tilted, and a northeast-striking, extensional anticline formed between oppositely dipping normal fault systems there.

Building on the stratigraphic-structural understanding from STATEMAP mapping, we are using other funds to further resolve the thermal and uplift history of the Pequop Mountains and to test conflicting interpretations of metamorphism and contraction, similarly conflicting interpretations of extension and exhumation, and the relation of deformation and magmatism to the origin of Carlin deposits.

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.

View or purchase here:

Preliminary Geologic Map of the Sloan Quadrangle, Clark County, Nevada

Nicholas H. Hinz, Alan R. Ramelli, and Seth Dee
Year: 2015
Series: Open-File Report 15-7
Format: plate: 37 x 26 inches, color, includes 1 cross section; text: 4 pages, b/w
Scale: 1:24,000

A 1:24,000 scale, preliminary geologic map of the Sloan 7.5-minute quadrangle in Clark County, Nevada. This quadrangle straddles Interstate Highway 15 along the south side of Las Vegas Valley and abuts the drainage divide with Ivanpah Valley. The actively managed Sloan Quarry is located in the NW quarter of the quadrangle. The north half of the quadrangle includes new housing developments in the City of Henderson, the Henderson Executive Airport, and new developments in the unincorporated communities of Paradise, Enterprise, and Sloan. The southeastern margin of this map area covers the north end of Hidden Valley and contains parts of each of the following land use features: the Sloan Canyon National Conservation Area, the Sloan Canyon Rock Art Site, and the Sloan Rock Art Area of Critical Environmental Concern.

The bedrock exposures in the quadrangle consist of Paleozoic carbonate basement and Tertiary volcanic and sedimentary rocks. The Paleozoic stratigraphy includes the Early to Middle Devonian Sultan Limestone, the Late Devonian to Early Mississippian Crystal Pass Limestone, the Mississippian Monte Cristo Group, and the Late Mississippian to Early Permian Bird Spring Formation. Four sub-units in the commonly undivided lower part the Bird Spring Formation were distinguished in the Sloan quadrangle. The Tertiary section includes a complex section of fluvial gravels and volcanic rocks. The fluvial gravels reach 350 m thick, fill a previously unrecognized paleovalley segment with as much as 500 m of preserved paleotopography. The volcanic rocks include middle Miocene basalt, basaltic andesite, andesite, and dacite that were locally erupted. The lower-most volcanic rocks are intercalated with the uppermost fluvial gravels. The Paleozoic section was initially deformed during the Sevier and/or Laramide orogenies and were displaced along reverse faults, thrust faults, and strike-slip faults. Normal faults associated with Basin and Range extension cut the Paleozoic strata and the lower half of the Tertiary section. Faults were not observed cutting the upper half of the Tertiary strata or the Quaternary surficial deposits.

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

View or purchase here:

Discover Science Lecture Series—Karl Karlstrom on the Grand Canyon—November 19

Karlstrom microscope_300Discover Science Lecture Series

When: Thursday, November 19 at 7:00 p.m.
Where: Redfield Auditorium, Davidson Mathematics & Science Center

Grand Canyon expert Karl Karlstrom to talk on origins of natural wonder of world:
Next speaker in the Discover Science Lecture Series at University of Nevada, Reno
Nevada Today, 10/27/2015 – by Mike Wolterbeek

“Professor Karl Karlstrom has spent a lifetime studying rocks, including the 225-mile long natural wonder of the world, the Grand Canyon. His lecture will be about the 140-year long debate about the origin and age of the mile-deep canyon with its billions of years of geologic history exposed by the Colorado River. Karlstrom is on the faculty at the Department of Earth and Planetary Sciences at the University of New Mexico and is a foremost expert on the geologic evolution of the Grand Canyon.”

Karlstrom named UNM’s 60th Annual Research Lecturer:
Annual award one of highest honors bestowed on faculty
UNM Newsroom, 4/6/2015 – by Steve Carr

 “Dr. Karl Karlstrom has spent a lifetime studying rocks. A professor of geology in University of New Mexico’s Department of Earth and Planetary Sciences (E&PS), Karlstrom has carved out an impressive academic career conducting research on rocks at one of the world’s most famous laboratories in one of the most fascinating places – the Grand Canyon.”

Photo Contest Details for 2017 Calendar—deadline May 31, 2016

Mt_Rose_Hinz_8_south_face_Mt_RoseRGBCalling all photographers! NBMG is already accepting photographs for the Nevada Geology Calendar 2017.  If you have photographs of interesting geologic features or landscapes from your fieldwork or travels that you would like to submit for next year’s calendar, please email Jack Hursh at NBMG.

Here are the details for this contest for the 2017 calendar:

  • Deadline for entries is May 31, 2016.
  • Photos need to be taken in Nevada. A location description and/or GPS coordinates should accompany submissions along with description.
  • High-quality, high-resolution photo files of at least 300 dpi are required for quality printing.
  • E-mail submissions to Jack Hursh (
  • NBMG cartographers will make the final decision on the winning photos.
  • Prizes will be awarded for first-, second-, third-, and fourth-place winners.

Photo Contest Winners for 2016 Calendar

Winning_photo_banner_cropCongratulations to the winners of the Nevada Geology Calendar 2016 photo contest!
You can view thumbnails of the winning photos here.

First Prize
Chip Carroon – Esmeralda Badlands, Monte Cristo Range, Esmeralda County (February main photo)

Second Prize
Jeff Lock – Granodiorite porphyry, Peavine Mountain, Washoe County (March second mini photo)

Third Prize
Cheryll Glotfelty – Pyroclastic-fall tuffs near Hiko, Lincoln County (September main photo)

Fourth Prize
Jeremy Vlcan – Spring Valley State Park volcanic tuff, Lincoln County (December main photo)

Thank you all for your wonderful photo contributions! Winners received a copy of the calendar and a beautiful Nevada-shaped piece of gypsum cut by Jon Price.