View of the Big Lost River and high peaks of the Lost River Range from ISU Geosciences’ Lost River Field Station near Mackay, Idaho.

2021 Call for Field Trip Logs, Papers, and Conference Volunteers

Join us for the 2021 TRGS Field Conference at Idaho State University (ISU) Geosciences’ Lost River Field Station near Mackay, Idaho ( We welcome proposals for field trips, posters, and papers about any aspect of the geology in and around the Lost River Valley. Field guides, abstracts, and papers will be published in Northwest Geology, the annual publication of TRGS. Please contact Dave Pearson ( by March 15, 2021 with your proposed titles. Submission guidelines are posted at All manuscripts and road logs must be received by April 15, 2021.

The Lost River Field Station, located in the Big Lost River Valley, is nestled at the foot of Borah Peak, the highest mountain peak in Idaho. The region is home to spectacular landscapes and a tremendous diversity of geology: folded and faulted sedimentary rocks, ductilely deformed Archean and Proterozoic metamorphic and igneous rocks in the Pioneer metamorphic core complex, fossiliferous sedimentary
rocks, ancient and active faults, Cenozoic volcanic and plutonic rocks and related mineralization, recent
alpine glaciation, and Quaternary geology. Want to help with the conference? Contact Paul Link at

Tentative plan for TRGS 2021 at ISU Geosciences’ Lost River Field Station
Host: ISU Geosciences Department
Thursday to Sunday July 29 to Aug. 1, 2021


General chair: Paul Link
Food and Logistics Chair: Ryan Anderson; Brian Mahoney
Editor Northwest Geology and field guide (Manuscripts due April 15, 2021): Dave Pearson
Thurs night TRGS Board Meeting


Friday morning presentations (tentative)
Donna Delparte and Ryan Anderson—Field Camp at LRFS, Drone Footage and Action Shots
Dave Pearson—Synthesis of east-central Idaho fold thrust belt research.
Brian Mahoney—New DZ studies of Belt Supergroup
Emily Kleber and Zach Lifton—Earthquake studies in N Utah and SE Idaho
George Grader—Devonian facies?


Field trips (as of April 29): 


July 30 Friday half-day


1. Paul K. Link and Bradford R. Burton: Cross section of the Cordilleran orogenic belt over Trail Creek road north of the Pioneer Core Complex, central Idaho.


2. Paul Wetmore and Chuck Connor: Geophysical transect Lost River Valley and the Lost River fault from the Thousand Springs segment down to the plain. 


July 31 Saturday


1. James Vogl, Megan Borel, Rory McFadden, Carolina Ortiz-Guerrero: A tale of two detachments: Structural relationships and strain along the northwest margin of the Pioneer Mtns. metamorphic core complex.


2. Glenn Thackray and Braedon Warner— The Big Lost River Floods and Glaciation of East-Central Idaho.


3. Keian Moran and Ryan McDermott:  Geology, historic and present activity of the Empire mine project, Custer County, Idaho,


4.  Zachery M. Lifton : Lost River fault and the Borah Peak Earthquake fault scarp.


5. Tentative-- Shannon Kobs-Nawotniak: Craters of the Moon.


Sunday Aug. 1


1. Elizabeth S. Petrie and Bradford R. Burton: Kinematics, polyphase deformation and graphic distribution within the Pioneer fault - zone, Little Fall Creek, western Pioneer Mountains.


2. David M. Pearson and Paul K. Link: Post-Belt Supergroup Mesoproterozoic to Cambrian rocks at Leaton Gulch.


3. David E. Stewart, Jesse Mosolf, Colleen Elliot, and Reed S. Lewis: Eocene Challis volcanic rocks near Challis, Idaho.


Monday Aug 2 

George Grader: Lost River Range: Rock Creek and Devonian sandstone channels in Jefferson Dolomite with optional climb of Borah Peak.


Tues Aug. 3

Dave Stewart: North Fork of the Big Lost River; Jim Canyon Challis volcanic section.