The OWL piques the interest of geologically minded persons in part because its characteristic NW-SE angle of orientation - approximately 50 to 60 degrees west of north (a little short of northwest)[REF] - is shared by many other seeming local features across a broad swath of geography.
Likewise to the east, where both the OWL and the Brothers Fault Zone become less distinct in Idaho where they hit the old North American continental craton and the track of Yellowstone hotspot.