2023-02-18 Chris Goldfinger — The Next Great Cascadia Earthquake – How Did We Get Here?
Dr. Chris Goldfinger, explores the relation of offshore turbidites to the paleoseismic record of the Cascadia subduction zone. During this presentation, Chris described that submarine paleoseismology is a multidisciplinary science that allows us to reconstruct earthquake histories extending back thousands of years. He provided information on the use of a variety of techniques, many originally developed for petroleum exploration, to study earthquake-generated submarine deposits (turbidites). By correlating these deposits over broad areas and examining their sedimentological characteristics, we gain insight into recurrence intervals, fault rupture lengths, event clustering, long-term strain histories, paleo-slip characteristics, and interactions between faults. He compared turbidite… Read more2023-02-18 Chris Goldfinger — The Next Great Cascadia Earthquake – How Did We Get Here?
2023-03-15 KPTZ Interview with David Williams, prelude to Seattle’s Geologic Secrets
Nan Evans of KPTZ and Seattle Naturalist David Willams, will discuss “A Sense of Place – What is it?” This is a prelude to David’s March 18th lecture entitled “Secrets of Seattle Geology—Connections of the human story and the geology story.” The interview is for Nature Now, a weekly radio broadcast on KPTZ 91.9 MHz. The interview will be recorded as a MP3 file and broadcast three times preceding David’s March 18th lecture for the Quimper Geological Society: Show #610: David Williams—A Sense of Place: What does that mean? Broadcast on March 15 at 12:30 PM; March 16at 5:30 PM;… Read more2023-03-15 KPTZ Interview with David Williams, prelude to Seattle’s Geologic Secrets
2023-03-18 David Williams—Secrets of Seattle’s Geology: Connections of the human story and the geology story
The Talk. Unlike many regions in the country, the Seattle area is constantly reminded of its geologic past, present, and future. Whether it is our landslides, our glacier-carved topography, or our volatile volcanoes, this area’s geologic history is young, dynamic, and accessible. In this talk, I will explain why we can blame California for some of our geo hazards, how coal influenced our economic development, and why it’s harder to travel east/west than north/south. Denny Hill, Seattle, 1910 The Lecturer. David B. Williams is an author, naturalist, and tour guide whose award-winning book, Homewaters: A Human and Natural History of… Read more2023-03-18 David Williams—Secrets of Seattle’s Geology: Connections of the human story and the geology story
2023-04-29 Skye Cooley — Soil-climate evidence for timing of the Cascade uplift and creation of its rain shadow
Skye Cooley, independent geologist from Montana, will be presenting an interesting story about timing of the Cascade uplift and creation of its rain shadow as evidenced by the presence and distribution of arid-land soils, specifically calcic soils and calcretes in eastern WA. Skye has been working on this subject for several years and has visited hundreds(?) of outcrops. The presence of the calcretes touch on the timing of the Cascades’ rise (dry climate info), growth of Yakima Fold Belt uplifts (paleoslope info), and ancient glacial floods (stratigraphic info). The lecture will be on Saturday, April 29th and is our second post-Covid in-person lecture. We’ll… Read more2023-04-29 Skye Cooley — Soil-climate evidence for timing of the Cascade uplift and creation of its rain shadow