AEG Meeting—Jahns Lecture—Thursday, February 6

Speaker: Scott Lindvall, 2019–2020 AEG/GSA Richard H. Jahns Distinguished Lecturer 2019-2020
Topic: Characterizing Fault Displacement Hazards: Significant Progress and Significant Uncertainties
Abstract: This talk will focus on the different methods and underlying data used to develop probabilistic and deterministic fault displacement estimates as well as our understanding of fault behavior (slip rate, magnitude, and recurrence) and the uncertainties associated with fault behavior and observations of historic fault slip. The presentation will also raise critical questions regarding both methodologies and design criteria used for infrastructure projects in light of these uncertainties.
Biography: Scott Lindvall is a Certified Engineering Geologist in California with 35 years of experience working in the consulting industry performing seismic and geologic hazard analyses, fault investigations, and engineering geology studies for both existing and proposed critical facilities. Full bio.

Richard H. Jahns Distinguished Lectureship:The Richard H. Jahns Distinguished Lectureship was established in 1988 by the Environmental and Engineering Geology Division and the Association of Engineering Geologists, jointly, to commemorate him and to promote student awareness of engineering geology through a series of annual lectures at academic institutions.”

COST: Members: $30.00, Non-Members: $32.00, Students: $25.00

Merrily Graham
Social Hour Sponsored by Doug and Merrily Graham.

Currently seeking a sponsor for student dinners! AEG can provide an itemized receipt for student dinner sponsorship. Email an AEG officer if you or your company is interested.

The Bar is sponsored, and we are providing complimentary dinners to the first three students who submit RSVP’s. Any additional students will be charged $25.

The monthly chapter meetings are held on the 2nd or 3rd Thursdays of every month, unless notified otherwise.

Nevada Petroleum and Geothermal Society Meeting—Thursday, January 9, 2020

Title: Geothermal Systems, Saline Lake Basins and Mineral Extraction
Speaker: Will Osborn (Geothermal Solutions Inc.)

Abstract: The extraction of lithium and other industrial minerals from geothermal fluids and evaporite deposits is receiving renewed interest due to the growing demand for electric vehicles and storage of renewable energy. A review of hypersaline brine chemistry and previous efforts to extract minerals from geothermal fluid at the Salton Sea geothermal field elucidates a primary impediment to commercial development. A cost-effective, rapid lithium extraction technique is essential, as an alternative to the traditional water-consumptive evaporative concentration method, to spur additional development of the Salton Sea geothermal field and new lithium resources identified in Northern Nevada, and elsewhere around the world.

Bio: Will has thirty-five years of experience in geothermal energy exploration, resource development, plant operations, and implementation of innovative technology, including Engineered Geothermal Systems (EGS) and mineral extraction. He holds earth science degrees from University of California at Santa Cruz and Riverside. His M.S. thesis work on the geochemistry of the Salton Sea geothermal system revealed the evolution of sulfur and sulfate minerals originating in the overlying saline lake basin. From 2000-2002, he was General Manager of CalEnergy’s zinc extraction facility. More recently, his work has involved lithium extraction from geothermal systems and the saline lake basins of Northern Nevada.

What: Nevada Petroleum and Geothermal Society Monthly Meeting
Date: January 9, 2020; 06:30 PM to 09:30 PM
Location: Tamarack Junction, Reno
Boart Longyear Drilling Services will be sponsoring the bar.
Event information and reserve your seat!

AEG Meeting—Thursday, January 9, 2020

AEG Logo

SPEAKER: Jesse Ruzicka
TOPIC: Geologic Challenges of the Boulder City Bypass

Abstract: The Boulder City Bypass, also known as I-11, is the first new interstate to be successfully constructed within the US since the 1970’s.  The 12.5 mile long stretch of Phase II begins at US95 and skirts to the south of Boulder City, through the El Dorado Mountains and terminates near Goldstrike Canyon just east of the Hoover Dam Lodge.  Now open to traffic, it relieves much of the traffic congestion that was once commonplace through Boulder City.  The project included 11 bridges, over 100 culverts, a wildlife overcrossing, and a scenic overlook more than 1,000 feet above Lake Mead. A portion of the project was constructed through the El Dorado Mountains and the Lake Mead National Recreation Area under the jurisdiction of the U.S. National Park Service.

This presentation will focus on the geologic challenges encountered during construction of the interstate through the El Dorado Mountains.  Such challenges as numerous rock cut slopes up to 280 feet in height, controlled blasting, rockfall containment, rock slide mitigation, rock bolting, highly variable geologic conditions, and unforgiving steep terrain.

Biography: Mr. Jesse Ruzicka graduated from the University of Nevada, Reno in 2003 with a Bachelor’s degree in Geological Engineering. Since that time, he has been involved in numerous projects providing geotechnical design and support for residential developments, flood control projects in Sacramento and Reno, commercial/industrial developments, roadway and bridge design, and mining projects in Nevada, California, Canada, and Mexico.

He has been involved in many high profile transportation projects in the states of Texas and Nevada including such projects as Phase II of the Boulder City Bypass, the US395 North Valleys project, the I-15/US93 Garnet Interchange, the SR28 Shared Use Path at Lake Tahoe, SH183 Managed Toll Lanes in Dallas, and the Harbor Bridge in Corpus Christi.

Jesse has been involved with AEG since 2001, serving as a past secretary of the Great Basin Chapter from 2010 to 2013 and chair from 2014 to 2016.  Since 2016, Jesse has served as an advisor to the chapter.

COST: Members: $30.00, Non-Members: $32.00, Students: $25.00

Merrily Graham

Social Hour Sponsored by Doug and Merrily Graham.

The monthly chapter meetings are held on the 2nd or 3rd Thursdays of every month, unless notified otherwise.


American Institute of Professional Geologists (AIPG)
30th Annual AIPG Exploration Roundup
Date:  Tuesday, December 10th
Where: Atlantis Hotel
Open Bar: 6:00
Dinner: 7:00
Program: 8:00

Click here for more details:

Companies: Contact Gold, OceanaGold, Blackrock Gold, McEwen Mining, Renaissance Gold, Nevada Copper, Bravada Gold, Barrick Gold
Meeting Sponsor:  Boart-Longyear
Cost: $70 AIPG/GSN Members/Spouses; $75 Others (cash, check)
Mackay Students:  Free
Reservations: by December 6th, 5:00 PM to Kel Buchanan:
AIPG NV Section President
Kel Buchanan, CPG-6058,
775-786-4515, fax 786-4324

Raffle for mineral specimens provided by Mark Stock, Global Hydrologic Services Inc.

AEG Great Basin Chapter Meeting—October 18

AEG Great Basin Chapter MeetingOctober 18

Sign-up details below.

Speaker: Rich Koehler, NBMG
Topic: Active Faulting in the North Valleys Region of Reno, Nevada: A Distributed Zone within the Northern Walker Lane

Abstract: At the latitude of Reno, Nevada, USA, ~15-25% of the Pacific/North American plate boundary strain is accommodated east of the Sierra Nevada through a combination of normal oblique (dextral) slip along the eastern Sierra Nevada range front and dextral slip along faults in the northern Walker Lane. The North Valleys region sits within the northern Walker Lane directly east of the Sierra range front and is characterized by a series of small north-striking basins bound by Quaternary active faults that accommodate dextral oblique extension.  Geodetic studies of the North Valleys estimate that the faults collectively accommodate 0.9-1.7 mm/y of extension and <0.3 mm/y of dextral slip; however, few Quaternary geologic/paleoseismic studies have been conducted.

Here I summarize geologic observations on the tectonic geomorphic expression and relative activity of faults within and bounding the North Valleys based on interpretation of lidar-derived hillshade images and field reconnaissance.  The results indicate that the faults all exhibit evidence of active late Quaternary deformation, including offset alluvial fan deposits and abrupt range-front escarpments and are characterized by extension rates on the order of hundredths to tenths of millimeters per year.  Cumulative geologic extension rate estimates across the North Valleys are slightly less than rates measured geodetically.  On-going mapping, paleoseismic trenching and numerical dating of displaced surfaces are being conducted to refine the style and amount of deformation with the goal of better understanding the role of the North Valleys in transferring dextral oblique extension from the Sierra Nevada range front to faults along the northeastern Walker Lane.

Biography: Dr. Rich D. Koehler is an Assistant Professor at the Nevada Bureau of Mines and Geology and the Department of Geological Sciences and Engineering at the University of Nevada, Reno. His research is focused on earthquake geology, Quaternary geology, paleoseismology, geomorphology, and engineering geology. Dr. Koehler is specialized in using advanced techniques including air photo, lidar, and satellite imagery interpretation, Quaternary geologic and geomorphic mapping, and surveying to assess geohazards in a wide variety of terrains. Dr. Koehler is particularly well versed on topics in Quaternary geology in Nevada and has mapped in numerous valleys throughout the state.

His paleoseismic research throughout the western U.S.—including the study of faults in California, New Mexico, Washington, Alaska, and Nevada—has been funded by the U.S. Geological Survey and the National Science Foundation. His international project experience includes studies in Turkey, Taiwan, Jamaica, and Haiti.


SOCIAL HOUR: 5:30PM (Sponsored by Doug and Merrily Graham)

Members: $27.00, Non-Members: $30.00, Students: $20.00

The Bar is sponsored, and we are providing complementary dinners to the first three students who submit RSVP’s. Any additional students will be charged $20.

Merrily Graham, AEG Great Basin Chapter Chairperson

Please give us a 48 Hour Cancellation Notice if you are not able to attend. “No shows” without proper notification will be charged. Thank you.

AEG Meeting Schedule—Fall 2018 / Spring 2019
October 18, 2018 – Rich Koehler, Active Faulting in the North Valleys Region of Reno, Nevada
November 8, 2018 – Gary Luce, “Burning Man Black Rock Playa Investigation”
December 13, 2018 – Meet & Greet Holiday Party & Fund Raiser
January 10, 2019 – Shawn Gooch, “Permitting Metals Mining in Nevada”
February 7, 2019 – Jahns Lecturer, Debbie Green, AEG Dinner Presentation
February 8, 2019 – Jahns Lecturer, Debbie Green, “Tale of Two Waste Sites” lecture on the UNR campus
March 14, 2019 – Wendy Calvin, “Core Spectral Imaging”
April 18, 2019 – Student Night

AEG Great Basin Monthly Meeting—December 6

Association of Environmental & Engineering Geologists, Great Basin Chapter, Monthly Meeting

Speaker: Dr. John Wakabayashi, 2017–2018 Jahns Lecturer
Date: Wednesday, December 6 (change from usual monthly meeting date)—RSVP by December 4
Topic: Evolution of step-overs and bends along strike-slip faults: Implications for seismic hazards assessment

Abstract: Step-overs along strike-slip faults have been traditionally considered to grow in size and cumulative slip accommodation as more slip accrues on the parent strike-slip fault. In such a model with greater slip, a pull-apart basin grows larger and deeper and a restraining step-over generates more uplift and exhumation. Inspection of step-overs of the San Andreas fault system suggests that step-overs migrate with respect to material formerly within them. This requires progressive formation of new transfer structures in the direction of migration. This process appears to operate from the meters/tens of meters scale of sag ponds and small push-up blocks to multi-kilometer scale basins and uplifted welts, with the Mendocino Triple Junction region being perhaps the largest scale structure of this sort proposed. Migrating step-overs result in inversion at all scales from thrusted sag pond deposits to inverted large-scale sedimentary basins. This style of step-over migration complicates assessment of long-term displacement on strike-slip faults because the zone of displacement is commonly much broader than the active strand, and this also applies to more recent displacement and earthquake history. Accordingly, siting of paleoseismic trenches needs to address this potential complexity in order to most optimally capture the full fault slip rate (for fault-parallel trenches) and most complete earthquake histories (for fault-crossing trenches). In addition the migrating step-over mechanism leads to propagation of some fault stands and the dying out of activity on others. This may result in some faults with a large cumulative displacement that have little or no late Quaternary activity whereas some immature strands with little geomorphic expression may accommodate significant slip rate.

Based on the following published papers (but the paleoseismic implications are not in these papers):

Wakabayashi, J., 2007, Step-overs that migrate with respect to affected deposits: Field characteristics and speculation on some details of their evolution: in Cunningham, W.D., and Mann, P., eds. Tectonics of strike-slip releasing and restraining bends in continental and oceanic settings.  Geological Society of London Special Publication 290, p. 169-188.

Wakabayashi, J., Hengesh, J.V., and Sawyer, T.L., 2004, Four-dimensional transform fault processes: progressive evolution of step-overs and bends: Tectonophysics, v. 392, p. 279-301.

Biography: John Wakabayashi is a San Francisco Bay Area native who moved to Fresno in 2005 to begin his academic career as a geology professor at California State University, Fresno. He received his B.A. in Geology in 1980 from UC Berkeley, and his PhD in Geology in 1989 from UC Davis (advisor: Eldridge Moores). He is a Professional Geologist (California) and a Fellow of the Geological Society of America.

After graduating from Davis he worked as an engineering and environmental geologist for 16 years (1989-2005), the last 13 years as an independent consultant based in Hayward, California, before becoming an academic. He worked on a variety of different types of projects, including seismic hazard evaluation/paleoseismology, slope stability, engineering and forensic petrography, naturally occurring asbestos, and two Superfund projects on which his primary specialty was evaluation of ambient concentrations of metals of environmental concern in soils and rock. He was a member of the Working Group on California Earthquake Probabilities.

When not doing project work (i.e. when not billable), he conducted independent research, some of which derived from his project work, but most of which dealt with more esoteric research issues such as subduction initiation processes, metamorphic P-T paths and metamorphic contrasts as tectonic indicators, emplacement of ophiolites, subduction interface processes and development of subduction complexes, evolution of orogenic belts, development of strike-slip fault systems, and long time and length scale geomorphology. He incorporated academic research of his own and others into all of his project work, trying to bridge the academic-applied geology gap from the standpoint of a practitioner. After becoming an academic he has continued his efforts to bridge this gap, with realization that the vast majority of geology professors have never been employed in the engineering and environmental geology profession that most geology graduates will work in. He incorporates both his professional and research experience into his teaching so as to better prepare students for professional careers, as well as providing a foundation for students who wish to undertake graduate study.

His research has resulted in 82 published papers and over 100 abstracts tied to presentations at major geoscience meetings. The breadth of his research has broadened rather than narrowed over time. In spite of the wide range of research interests, the geology of that beguiling train wreck of rocks known as the Franciscan Complex of coastal California remains his chief interest and the many aspects of mélanges have become his main focus since 2009. At Fresno State he teaches non-major introductory geology, geology major undergraduate courses in petrology, geomorphology, and structural geology, graduate courses on active tectonics/seismic hazard analysis and orogenic belt tectonics, and his bread-and-butter undergraduate course in advanced geologic field mapping (he makes his students map Franciscan along with landslides, flights of stream terraces and some potentially active faults). He has supervised or is supervising a large number of graduate and undergraduate student researchers, and this includes a number of students from outside of Fresno State.

Outside of geology and beer (an amateur brewer since 1994), he is probably best known for his experience trout fishing in the backcountry (must be hiked to) of California, having launched casts into over 750 different lakes, about 700 of these in the Sierra Nevada; 2015 was an especially good summer. His strength and fitness routine that prepares him for his fieldwork and recreational hiking (and burns off some of the beer), as well as holding his body together for his return to playing basketball, has also gained some notoriety. This routine includes excessively long plank sessions and multiple repetitions of muscle ups.

(Hotel name change – same location)

The Social Hour is sponsored by Silver State Analytical Labs – Open Bar.

Members: $25.00
Non-Members: $29.00
Students: $15.00
Student Dinners are sponsored for the first four who sign up for the meeting. All other students will be charged $15.

Please give us a 48 our cancellation notice if you are not able to attend.

Nevada Petroleum and Geothermal Society Monthly Dinner Meeting—Thursday November 2, 2017

Geothermal Systems and Mineral Deposits: Similarities, Differences, and Significance
SPEAKER: Dr. Dave Boden, Professor of Geoscience at Truckee Meadows Community College
BIO: Dave Boden is currently Professor of Geoscience at Truckee Meadows Community College in Reno, Nevada. Since 2007, he has taught a course on the geology of geothermal resources as part of the college’s degree programs in renewable energy (geothermal emphasis) and natural resources. He also teaches a course on the geology of geothermal energy at UNR as part of its graduate degree program in sustainable resources. Although perhaps still a newcomer (some say interloper) to the geothermal industry, Dave nonetheless wrote a book entitled The Geologic Fundamentals of Geothermal Energy, which also draws upon both his teaching and prior 20 years looking for and studying base and precious metal deposits in the fossil analogs of today’s geothermal systems. Dave considers the book, although published, still a work in progress, due to the complexities and multifaceted nature of geothermal systems, and welcomes any comments for improvement. Dave has earned degrees in geology and geological engineering from UC Davis, Colorado School of Mines, and Stanford University. He is currently a member of the board of directors of the Geothermal Resources Council, where he chairs its Education Committee. When not teaching (or speaking), Dave enjoys hiking and skiing to backcountry hot springs with family and friends.

Location: Tamarack Junction
13101 South Virginia Street
Reno, NV  89511
Time: 6:30 PM – 9:30 PM Pacific
Check-in and Cocktails at 6:30 PM
Dinner Served at 7:00 PM

NPGS Member – Prepay US $25.00
NPGS Member – Pay at Door US $28.00
Non-Member – Prepay US $30.00
Non-Member – Pay at Door US $33.00
Student – US $ 15.00

Please RSVP for the dinner by Tuesday, Oct 31 with the following link:

This is a new registration process with new contact information and an option to prepay your dinner. Please read the new registration page carefully.

Cancellation Policy
If you wish to cancel your registration, please contact Jake Zachry ( or Tom Gallagher ( so we may have an accurate headcount for food and accommodations. At this time, NPGS is unable to offer refunds for prepaid registration. However, we are happy to provide a credit for future meetings.

This month’s cocktail host is San Joaquin Bit. Thank you Merritt Hayslett and Jason Mundorf for your support of NPGS!