August 8, 2005:
Rick Blakely (US Geological Survey, Menlo Park) and Bonnie Magura (Jackson Middle School, Portland) examine layers of Columbia River Basalt flows exposed on walls of gravel quarry in the Tualatin Mountains northwest of Portland. The Miocene Columbia River Basalts erupted from fissures in eastern Oregon and Washington states between about 12 and 16 million years ago. These flood basalts have very low viscosity (are very fluid) and therefore flowed great distances across ancient Oregon.
Bonnie Magura explaining methods for drawing and labeling geologic diagrams to Wallowa County teachers, Colby Knifong and Kathy Willett. While in the quarry and along steep outcrops, workshop participants wore hardhats. Notice the EarthScope logos on hardhats.
Rick Blakely discussing the principles and applications of gravity and magnetic anomalies at a location on top of the Tualatin Mountains. Precise measurements of Earth’s gravitational and magnetic fields can be used to image subsurface geologic structures such as faults and folds. Determining locations of crustal faults is important to evaluation of earthquake hazards.
Kip Ault (Lewis and Clark College) and Chris Hedeen (Oregon City High School) discussing layering within sedimentary rocks of the Astoria Formation at Hug Point on the Oregon Coast. Composition and fossils of these rocks indicate they were deposited on the ocean floor near the shoreline. Sedimentary features, such as cross beds, have modern analogs in nearby coastal streams and allow the direction of water flow at the time of deposition to be determined.
Comparing our observations at Hug Point. The dark rock ledge is a dike of Columbia River Basalt that invades the marine sedimentary rocks of the Astoria Formation. These basalts flowed across the entire width of ancient Oregon into the offshore environment. Columbia River Basalts often form headlands and sea stacks along the northern Oregon coast.
Home sweet hut at Camp Kiwanilong operated by Oregon Museum of Science and Industry (OMSI) Science Camps. Through collaboration with OMSI Science Camps, participants in Teachers on the Leading Edge were housed at Camp Kiwanilong August 8 and 9, 2005. The local setting is thick forest on ancient dunes within one mile of the northwest Oregon coast.
Group shot on steps of dining hall at Camp Kiwanilong. Front row left-to-right: Kathy Willet, Colby Knifong, Bob Butler, Dylan Hardy, Bonnie Magura, Kip Ault. Back row left-to-right: Gene Ramberg, Chris Hedeen, Rob Gomoluh, Adam Joy, Roger Groom, Karen Shay, Beth Biagini, and Wendy Archibald.