 This National Natural Landmark is an extensively eroded channeled scablands landscape, characterized by hundreds of isolated, steep-sided hills (buttes) surrounded by a braided network of numerous channels.All but the channel through which Crab Creek flows are currently dry.It is a classic example of the tremendous erosive powers of extremely large floods such as those that reformed the Columbia Plateau volcanic terrain during the late Pleistocene glacial Missoula Floods.