Rulo is a Palouse outcrop with a twist . The Rulo site is a large, double-sided roadcut located a few miles northwest of Walla Walla along Sudbury Road. Roadcuts and nearby outcrops expose what at first appears to be the same-old, same-old innards of a Palouse loess hill, but upon closer inspection proves to be much more interesting. Faulted Miocene basalt bedrock is overlain by locally-derived gravel and an unusual micaceous, fossiliferous fluvial deposit of Pliocene age. Ab