Versus unclean. Edible. You know, Old Testament stuff. Kosher.
Regarding geology, I'll repeat what I stated before. Over the course of my less than fifty years, I've witnessed geology move from a uniformitarianism that verged upon orthodoxy, to an embrace of the very catastrophism that was once ridiculed, and that ridicule was in large part based upon a rejection of any remotely religious connotation. There is evidence of massive flooding worldwide. There are legends of massive flooding among every people on the face of the earth and that is no coincidence.
Certainly catastrophism has its place when you look at geology. The Chicxulub astroid, Yellowstone’s major eruptions, the formation of the Deccan Traps, the Siberian Traps, etc. All had major impacts on the history of the Earth. However, their impact on geologic history are decidedly minor in comparison with the movement of the various tectonic plates. Some 75% of the active volcanos are on the various Pacific plate boundaries. In fact one of the super volcanos often listed in various catastrophism discussions, Toba is a product of plate movement and subduction including the accompanying water. There are a number of instances where a hot spot exists on a plate boundary.
However, the vast majority of geological change is of the inch or two a year variety. That creates massive stress which, in turn, result in many types of faults, folds, etc. The 1964 Alaska Earthquake, the most massive we’ve seen by many measures, was related to a thrust fault which moved up to 38 feet in some areas. It was a plate boundary earthquake like the recent, massive Japanese earthquake and tsunami, the Boxing Day Tsunami, Chili earthquakes and even the San Francisco earthquake.
I come to my observations from my background in mining and personal interest over most of my seventy years. While I spent most of my time drilling holes in rock rather than studying it, I did learn the geologic history of four different ore bodies. A lot of the understanding of ore bodies has been consistent over 100 to 130 years. When modern plate tectonics came along much of this prior knowledge fit very well into the overall theories. It works.