Geophysical Imaging of Yellowstone's Hydrothermal Plumbing System Carol Finn, USGS Abstract: The nature of Yellowstone National Park’s plumbing system linking deep thermal fluids to its legendary thermal features is virtually unknown. The prevailing concepts of Yellowstone hydrology and chemistry are that fluids reside in reservoirs with unknown geometries, flow laterally from distal sources and emerge at the edges of lava flows. Here we present a high-resolution synoptic view of pathways of the Yellowstone hydrothermal system derived from electrical resistivity and…

FLC Geology major poster session (5-7 pm, Student Union Ballroom) Fort Lewis College Geology majors will be presenting their senior thesis projects from 5-7 PM in the Student Union Ballroom (Along with dozens of other majors!). FCGS attendees are invited and encouraged to come find the students to see the results of their hard work. Here is a list of students and speakers: Chandler La Duke - Water in the Desert: Stratigraphic Architecture, aquifer heterogeneity, and arsenic in the Jurassic…

SPEAKER: Bob Krantz (speaker bio below) TITLE: The Geologic and Fluid Evolution of the Paradox Basin ABSTRACT: The Paradox Basin of southeastern Utah and southwestern Colorado has had a long and complex history. In 2017 a team based at the University of Arizona, along with faculty and students from New Mexico Institute of Technology and Fort Lewis College began a four year project to characterize the geologic and fluid evolution of the basin. Specific investigations included structural and tectonic elements,…

Location: Fort Lewis College, Student Union, Vallecito Room Timing: 5:30 to 7:00: Happy Hour and Dinner Buffet 6:30 - 7:30: FCGS Business and Speaker Speakers: Lauren Broes, Kassandra Lindsey, Nathan Rogers - Colorado Geological Survey, Golden, CO Abstract: Update on recent surficial geological mapping in southwest Colorado by the Colorado Geological Survey. Geologic units include Cretaceous thru Quaternary deposits of four quadrangles between Durango, Bayfield, Ignacio and the New Mexico State line. During the summer and fall field seasons of…

Meeting Details: Where: Fort Lewis College, Durango, CO, Sitter Family Hall, Room 710 When: Happy Hour and Dinner served from 5:30 to 6:30, talk and raffle from 6:30-on Speaker: Nate Klema, University of Oregon Talk Title: Cascade Range magmatic uplift signaled by geophysical signals and disequilibrium topography of the Columbia River Gorge, USA Abstract of Talk: In volcanic arcs topography is built through a combination of magmatic and tectonic processes offset by erosion. Here the highest elevations are generally associated…

FIELD TRIP: THE MESOZOIC OF THE DURANGO AREA Date:  Saturday April 15th   Leaders: Drs. Gary Gianniny and David Gonzales, Fort Lewis College Price: $25 for Active, Associate, Honorary & Emeritus members, students free Limit: 23 total (18 Professional Members, 5 Students) Registration opens:  Online March 17th, 9am.  Links will appear below at that time. Description: This is a one-day trip looking at the Triassic Chinle (Dolores) Fm. through the Cretaceous McDermott Fm. (a.k.a. the Purple Cliffs).  As we travel from…

APRIL MEETING SPEAKERS: Fort Lewis Senior Geology Students TALK: Scott Thomas - Undiscovered Gold of Cherry Creek SHORT TALKS AND POSTERS: Sierra Carter: Monitoring a transitional snow zone in the San Juan Mountains: Are changing temperature trends impacting snow melt and discharge timing at Relay Creek? Klara Goldman: Dust on snow as a key factor affecting the timing of discharge in the Animas River Jaclyn Jack: Using seismic ray modeling to see subduction zone rock deformation effects on geophysical data…

Please join us for the last meeting of this FCGS season!  Timing: May 18, 2023; 5:30 to 7:30 pm Location: Sitter Family Hall (Geology building at Fort Lewis) 3rd floor balcony. If the weather turns poor, an alternate location will be announced. Content: this is a fun social get together, no speaker scheduled. Just come enjoy some appetizers, drinks, and the company of your fellow Society members.