Ancient Flood Beds & Calcrete - White Bluffs, WA
An exotic clast-bearing conglomerate at White Bluffs Overlook was left by an ancient Ice Age flood. The post-Ringold unconformity appears to be a sequence-bounding surface that may correlate with a late-Neogene unconformity in the Rocky Mountains. Flat-lying Pliocene Ringold lake beds (<5 Ma) are unconformably overlain by a meter-thick conglomerate composed of subangular calcrete rip-ups mixed with exotic clasts (granite, schist, andesite, quartzite). The conglomerate is Plei
Okanogan Valley Kame Terrace Mapping
The kame terraces of the Okanogan Valley are Alaskan in scale, but treeless and fully exposed. This extensive multi-level flight is continuously exposed between Brewster and Osoyoos, a distance of 100 km. The terraces record voluminous ice-marginal sedimentation during the final downwasting of the Cordilleran Ice Sheet (Okanogan Lobe) from Eastern Washington. They are composed of a mix of outwash gravels, till, lacustrine sediments, and boulders. Tread surfaces are paired in
Thanks a Lot, Erwin
In 1941, the talented cartographer Erwin Raisz of Harvard University's Institute of Geographical Exploration published a map showing the Olympic-Wallowa Lineament, a "straight four-hundred-mile-long structural line extending from Cape Flattery to the Wallowa Mountains". The Olympic-Wallowa Lineament crosscuts the whole of Washington, extending from Cape Flattery to the Wallowa Mountains in Oregon. Map by Reidel and Martin (2003). The prominent line diagonally bisects Washingt
