Abstract
It was good to see Froede and Oard (2007) reopen the discussion of the Pre-Flood/Flood Boundary within the Grand Canyon. They ably reviewed existing boundary proposals and criteria for placing them (Austin and Wise, 1994). Supporting those five criteria, Froede and Oard suggest "that the pre-Flood/Flood boundary should be located at or near the basement contact [Greatest Unconformity]" (p. 4; brackets added). I would like to speak of some additional evidence, both biblical and physical, for placing the boundary at the Greatest Unconformity.