Structures in Bathys Planum, southwest of the Tharsis Rise, Mars, compare to strike-slip faults in California, western United States. Local topographic highs and lows at step-overs between fault segments are likened to pop-up structures and pull-apart basins formed due to left-lateral strike-slip displacement along the faults. The faults are interpreted to have reactivated structures that preceded the propagation of Tharsis-incipient (Stage 1 Claritas tectonic center) graben through this region.