into Canada – is a major fault notable for considerable identified dextral strike-slip offset (opposite side moving laterally to the right) of at least . Its intersection with the OWL (near Kachess Lake) is the geological equivalent of an atom smasher, and the results should be informative. For example, that the OWL is not offset suggests that it must be younger than the last strike-slip motion on the SCF, anywhere from around 44 to about 41 million years ago (i.e., during the middle-Eocene epoch). And if the OWL is a strike-slip fault or megashear, as many have speculated, then it should offset the SCF, and whether the OWL offsets the SCF, or not, becomes an important test of just what the OWL is. So does the OWL offset the SCF, or not? It is hard to say, as no trace whatsoever has been found of the SCF anywhere south of the OWL. While some geologists have speculated that it does continue directly south, albeit hidden under younger deposits, not a trace has been found. If the SCF fault does not continue directly southward – and the utter lack of evidence that it does makes a case for evidence of lack – then where else might it be? suggest some possibilities: it may curve to the east, it may curve to the west, or it may just end. Tabor mapped the SCF turning and merging with the Taneum fault (coincident with the OWL) south of Kachess Lake. This conforms with the general pattern seen in Lakes Keechelus, Kachess, and Cle Elum, and associated geological units and faults (see image, right): each is aligned north—south at the north end, but turns to the southeast where it approaches the OWL. This is suggestive of the OWL being a left lateral (sinistral) strike-slip fault that has distorted and offset the SCF. But that is inconsistent with the SCF itself and most other strike-slip faults associated with the OWL being right lateral (dextral), and incompatible with the geology to the southeast. Particularly, studies of the region to the southeast (in connection with Department of Energy activities at the Hanford Reservation) show no indication of any fault or other structure comparable to the SCF. On the other hand, maps the SCF as proceeding southerly (without addressing the situation south of the OWL). (He has subsequently speculated that the missing part of the SCF may have been