The Proceedings of the Eighth International Conference on Creationism (2018)

A sixth notable aspect of the earth’s surface geology are what are referred to as the continental shields , including the Canadian, Baltic, Angaran (Siberian), African, Indian, Australian, and Antarctic shields. These large areas of exposed Precambrian crystalline igneous and high-grade metamorphic rocks have experienced significant erosion (often with more than 1 km of crystalline rock removed), are nearly flat, and have negligible, if any, sediment cover. When in earth history did such intense erosion occur if it was not during the Genesis Flood? And by what sort of process? 2. Encouraging new insights The numerical investigation described in this paper shed important new light on most of these prominent issues. First, regarding a source for the huge volume of Phanerozoic sediment present in the continental rock record, the calculations reveal that tsunami-driven cavitation erosion during the time span of the Flood can generate new sediment at a rate sufficient to account for a sizable fraction of the Phanerozoic sediment inventory. The cavitation, occurring at water speeds of several tens of m/s, rapidly reduces crystalline continental crustal rock to sand-sized and smaller particles. These sediment particles are readily suspended in the turbulent water associated with the tsunami as it makes its way at reduced horizontal speeds onto the continental surface. The large amplitudes of the tsunamis enable them readily to invade the Baumgardner ◀ Large tsunamis and the Flood sediment record ▶ 2018 ICC 301 Figure 5. Plots at 110 days of water/land surface height (a) , (b) ; cumulative depth of bedrock erosion, (c) , (d) ; and cumulative depth of deposited sediment, (e) , (f).