ocr: 360 Degrees of Grand Canyon Toroweap Area "Great quantities of cooled lava and many cinder cones are seen on either side; and then we come to an abrupt cataract. Just over the fall on the right wall a cinder cone, or extinct volcano, with a well-defined crater, stands on the very brink of the canyon. Major John Wesley Powell August 25, 1869 The Powell Report OROWEAP AREA
