By W.R. Barnhart

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.

An impediment to clear thinking about the boundary is found in the common assumption of the existence of Pre-Flood sedimentary rocks (PFSR). Austin and Wise (1994) strongly imply PFSR in their “sedimentary disconformity” criterion. Biblical descriptions of Earth prior to the Flood make me question PFSR. DeRemer et al. (2007) describes the Creation event beginning with an amorphous liquid-like mass that God brought into existence at the beginning of the Creation Week. Part of it was then developed into a planetary mass ready for life. This view leaves no mechanism (i.e., erosion) to produce widespread PFSR during creation. Therefore, if rain did not fall prior to the Flood (Genesis 2:5), PFSR would not have formed in significant amounts. Why do diluvialists assume PFSR?

Instead of erosion and sedimentation, crystallization seems to be the natural organizational pattern for rocks and minerals at granite, but rather naturally crystallized as individual grains at or near the surface? The metamorphic basement would have been the deeper rocks of the original crust, although some may have changed during crustal upheavals of the Flood.

Diluvialists who accept PFSR commonly cite Genesis 1:9–10, and interpret it to mean that stony continents emerged from the primordial ocean. But if the Creation events followed DeRemer et al.’s (2007) model, then the Bible may be describing a process of energized particles moving from an amorphous (“water”) state to an organized (“dry,” the word “land” is supplied by the translator) state. This is a process more likely to have consisted of crystallization, which is a constructive process, rather than the destructive processes of erosion and sedimentation….

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