Bend, Oregon
Columbia River Flood basalt flow with entablature/collonade jointing, interpreted as the results of flooding by a river over the top of a cooling flood basalt.
http://volcano.oregonstate.edu/book/export/html/486
Long, P.E., and Wood, B.J., 1986, Structures, textures, and cooling histories of Columbia River basalt flows: Geol. Soc. America Bull., v. 97, p. 1144-1155.
Bend
