Download or read book GigaFlood written by Rick Thompson (Artist) and published by . This book was released on 2014-07-01 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Revealing the effects of the Lake Missoula Flood in Northwest Oregon and Southwest Washington. Covers the Columbia River Gorge, Clark County Washington, and in Oregon, the Portland Basin, Tualatin, Yamhill and Willamette and Clackamas Valleys. Details visible incoming and outgoing flood channels, erosional remnants, kolks, erratics and other flood evidences visible today.