Plio-Pleistocene Calcretes & Age of the Cascades Rain Shadow
Calcrete overprints a regional unconformity of Pliocene-Pleistocene age in south-central Washington. The unconformity truncates lacustrine sediments of the uppermost Ringold Formation (8.0 to 3.4 Ma) and is overlain by glacial outburst flood deposits (<2 Ma). The aridity necessary for calcrete formation post-dates drainage of the last Pliocene lake system from Pasco Basin and pre-dates Ice Age cooling. The calcretes suggest a strong rain shadow first formed in Eastern Washing
Ucluelet & the Broken Islands Group, BC
Courtney took all of these photos. Wickaninnish. Our marina. The other guys' marina. Tofino's surf-saturated culture gently spills over into friendly Ucluelet. Dinosaur coffee is lucky coffee. A, Double-A, and Dr. Bob ready to haul slabs on discount rack Coyotes off Wya and Swale. Wait...what? Their team beat our team in both touch football and no-net sand volleyball. Goats on the roof and hippies in isle 7. Courtney's Guide Service is the best in Ukee. "Fifty-four and one-el
Creative Depictions of the Ringold Fm
Stratigraphy of the Ringold Formation of Eastern Washington (9.5-3.4 Ma) has recently drawn my attention. The Ringold is a young formation where the transition from unlithified sediments to lithified rocks is not yet complete. Also, no clear boundary exists between the uppermost Ringold (late Pliocene) and the lowermost Pleistocene sediments (<2.6 Ma). Sediments that comprise the Plio-Pleistocene transition are fairly fine grained and reflect a rather subtle geological transi
Where is the Neogene Seismic Record for the Yakima Fold Belt?
"Considerable work awaits sedimentologists on and adjacent to the Columbia Plateau before we will be cognizant of all aspects of the tectonic, volcanic, and climatic influences on regional sedimentation during the Neogene." - Gary Smith and others (1989) Where is the Neogene record of seismic shaking in eastern Washington? The Yakima Fold Belt (YFB) in central Washington is a set of west trending, fault-cored folds located in the back-arc of the Cascadia Subduction Zone. The
