Now meeting at Dick's Primal Kitchen, 4905 S.E. Woodstock Blvd, Portland. 

DO YOU HAVE A ROCK YOU WANT TO BRING TO SHOW-&-TELL?

Feel free to bring an interesting rock, mineral, or fossil to bring to show-and-tell! No scientific knowledge is required, but it's always fun to discuss:

WHERE DID YOU FIND IT? e.g. "my grandmother's yard" or "Wyoming" or "Clackamette Park" or even GPS coordinates on a map.

WHAT DOES IT MEAN TO YOU? Our group uses a scientific lens to look at the world, but the natural world has a lot of meanings to different people, so this might include:

• "This is the quartz crystal that started my love of geology at age 5!"
  
• "This cobble has special meaning to my fellow tribal members."
  
• "This 3 billion year-old fossil inspires awe every time I hold it!"
  
• "This is one of my field samples from my research last summer."

PSU graduate Andrew Dunning, M.S., GIT will discuss his work on coastal landslides, and Alyssa Smith returns with her Geology in a Nutshell News and Research.

Zoom link here.

The Yellowstone Plume, Columbia River flood basalts, and the making of the Pacific NW

The geologic hotspot that causes the volcanic activity in Yellowstone National Park was responsible for making most of the outstanding landscapes we see in the Pacific NW. This is largely due to what it initiated in Earth's crust and upper mantle that was ripe for reconstruction. Our presentation will focus on the Columbia River flood basalt event. By imaging structures in the upper mantle, we get clues that tell a fascinating story of plume-lithosphere interaction. But more than this, the imaging reveals the history of the subduction of the ancient Farallon plate that sets the stage for the Columbia River basalts, and we are drawn into the story of the entire Pacific NW.

Register for the Zoom event here (no charge for registration). Note: Zoom will open at 7:00 to allow participants to visit, the program will begin at 7:30.

Speaker Bio:

Dr. Gene Humphries grew up on the Columbia River basalts in eastern Washington, but didn't know it. After attending many schools, he ended up at Caltech where he earned his PhD in 1985. He has been working at the University of Oregon ever since. His main interest is in continental tectonics; his main technical skill is in seismic imaging.

Dr. Chris Goldfinger will give a special presentation on the evidence for a Cascadia subduction zone and San Andreas fault link, and Alyssa Smith returns with her Geology in a Nutshell News and Research.

Zoom link here.

Join us to hear PSU Geotechnical Engineering PhD candidate discuss her work on soil liquifaction mitigation using microbially induced desaturation, and Alyssa Smith returns with her Geology in a Nutshell News and Research.

Bimodal Volcanoes: The Injection Volcanism Model

Bimodal volcanoes have a different history than other kinds of volcanic features as they share both mafic and silica-based material. This presentation will show how this happens through what Dr. Paul Hammond called the injection volcanism model. The presentation will show how the different amount of SiO2 and MaFe effects the mineral composition and the volcanic products and explosiveness.

Register for the Zoom event here. Note: Zoom will open at 7:00 to allow pre-show attendee visitation. The program will begin at 7:30 PM.

Speaker Bio:

Steve Carlson has lived in the Pacific Northwest his entire life and has been teaching since he was 25 years old. He has been an adjunct professor at Portland State University since 1977, teaching Minerology and Igneous Petrology. He also taught in the Mature Learning program at both Clark College and The Discovery Center in Earth Science, was a Science Guide for Cruise West and Road Scholars, and a Director of Science Education at Portland Public Schools. He was the primary investigator as well as an author/editor on several NSF projects related to research on Mt. St. Helens. He received the Deans award for innovative instructions.