2024 Bretz Club Conference and Field Trip

Riding the tephra train: sources to sinks
Klamath Outdoor Science School, Chiloquin, OR


15th Annual Bretz Club Conference & Field Trip

April 26-27, 2024

Riding the Tephra Train: Sources to Sinks

Klamath Outdoor Science School (KOSS), 56101 Sun Mountain Rd, Chiloquin, OR 97624

Electronic maps are not advised and may guide you onto dangerous roadsPlease see: Directions to KOSS 


Registration is closed

This year's cost for the 2-day (2 night) conference is $175 for professionals and $95 for students.

FREE welcome dinner on Thursday when you select the option during registration!

Field Trip Guide and geo-enabled pdfs for each field day available here

Background reading papers available for download here!

Draft Schedule (subject to change at any time)

Thursday, April 25th

Afternoon/evening arrivals, check-in, meet, load your pop-up talk, buy raffle tickets and greet

4,4:30,5,5:30…KOSS staff lead geology and site orientation hike (group departure times ~1 hour hike)

6 Dinner

Friday, April 26th

7:30-8:30 Breakfast and Friday morning arrivals

8:30-9 Welcome and introductions

9-9:40 + 15 mins discussion/questions Andrew Meigs (Oregon State University)/ The on-going tectonic story of the Klamath Basin

10-10:40 + 15 mins discussion/questions Kathy Cashman (University of Oregon)/ Crater Lake: the eruption and its widespread impacts

11-12 Pop-ups

12-12:30 - Grab sack lunches and departure to field sites

12:30-4:30 Field trip - return to KOSS by 4:30 (2-3 sites)

5-6 – Dinner, raffle items set out and ticket sales

6-7 - Garin Riddle (Klamath Tribes) / Tribal stories of Mazama and Klamath Lake

7-8 Posters, snacks

8-? Raffle, music, dancing

Saturday, April 27th

7:30-9 Breakfast

9-9:40 + 15 mins discussion/questions Michael Cummings (Portland State University)/ Hydrogeologic responses in pyroclastic flow and Plinian air fall deposits east of Mount Mazama

10-10:40 + 15 mins discussion/questions Pat McDowell (University of Oregon)/ Holocene evolution of the Sycan-Sprague River system under the influence of the Mazama eruption, outburst flood, and geologic constraints

11-11:30 clean up the facility, grab prepared sack lunch, load up in vehicles for field trip.

12 -> ~4:00 Field trip

Early departure is possible and easy at any time


Bretz Club 2024 and 2025 will explore the complex interplay of volcanism, tectonics, erosion, and anthropomorphic forces in the Upper Klamath Basin. 

In 2024 we will explore landscape evolution from tectonic, volcanic, and fluvial perspectives. 

In 2025 we will focus on the impact that cultural activities such as dam emplacement and removal have on recent landscape evolution. We look forward to exploring this semi-arid landscape from a dry perspective.