In the 60s and 70s a simple creationist model proposed that, "The Flood split the land mass into the present continents."
[92] Steve Austin and other creationists proposed a preliminary model of catastrophic plate tectonics (CPT) in 1994.
[81] Their work built on earlier papers by
John Baumgardner and
Russell Humphreys in 1986.
[94][95] Baumgardner proposed a model of mantle convection that allows for runaway subduction and Humphrey associated mantle convection with rapid magnetic reversals in earth history. Baumgardner's proposal holds that the rapid plunge of former oceanic plates into the
mantle (caused by an unknown trigger-mechanism) increased local mantle pressures to the point that its viscosity dropped several magnitudes according to known properties of mantle silicates. Once initiated, sinking plates caused the spread of low viscosity throughout the mantle resulting in runaway mantle-convection and catastrophic
tectonic motion which dragged continents across the surface of the earth. Once the former ocean plates, which are thought to be denser than the mantle, reached the bottom of the mantle an equilibrium resulted. Pressures dropped, viscosity increased, runaway mantle-convection stopped, leaving the surface of the earth rearranged. Proponents point to subducted slabs in the mantle which are still relatively cool, which they regard as evidence that they have not been there for millions of years which would result in temperature equilibration.
[96]
Given that conventional
plate tectonics accounts for much of the geomorphic features of continents and oceans, it is natural that creationists would seek to develop a high speed version of the same process. CPT explains many geological features, provides mechanisms for the biblical flood, and minimizes appeals to miracles.
[97]
Some prominent creationists (Froede, Oard, Read) oppose CPT for various technical reasons. One main objection is that the model assumes the super continent
Pangaea was intact at the initiation of the year-long flood. The CPT process then tore Pangaea apart creating the current configuration of the continents. But the breakup of Pangaea started early in the
Mesozoic, meaning that CPT only accounts for part of the entire
Phanerozoic geological record. CPT in this form only explains part of the geological column that flood geology normally explains. Modifying the CPT model to account for the entire Phanerozoic including multiple
Wilson Cycles would complicate the model considerably.