2020 Bretz Club Conference and Field Trip

Lahar generated by melting of crater snow during a small explosion on March 19, 1982. Spirit Lake is in the lower left corner of the image. U.S. Geological Survey photograph by T. Casadevall.
Mount St. Helens: Lordy, lordy, look who's 40!
Toutle, WA

Bretz Club 2020 Virtual Conference "Mount St. Helens: Lordy, lordy, look who's 40"

The scientific program on Friday, April 24 includes presentations from Richard Waitt and Jon Major (USGS, Vancouver). If you'd like to share your own science, plan to give a pop-up talk (short 3 minute presentations on quite literally anything from ideas to announcements or otherwise).

*NEW* Supporting materials of interest:



  • Major, J.J., Grant, G.E., Sweeney, K., and Mosbrucker, A.R., 2020, A multidecade analysis of fluvial geomorphic evolution of the Spirit Lake blockage, Mount St. Helens, Washington: U.S. Geological Survey Scientific Investigations Report 2020-5027, 54 p., https://doi.org/10.3133/sir20205027.