Lidar hillshade image. Giant current ripples atop a terrace surface near Omak, WA. Hwy 97 is at the center of the image. The ripple field...

Geologists have long been fascinated with the high terrace that stands well above the modern Columbia River between Brewster and Chelan....

A robust association between thick calcretes (petrocalcic horizons) and lowland alluvial deposits is a key finding of my recent work in...