I finished Graham Hancock’s Fingerprints of the Gods (1995). He saved the best part of the book, an examination of Egyptian megalithic sites, for the final chapters and held back his final conclusion — more conjecture, really — for the tail end. The possible explanation Hancock offers for the destruction and/or disappearance of a supposed civilization long predating the Egyptian dynasties, the subject of the entire book, is earth-crust displacement, a theory developed by Charles Hapgood relating to polar shifts. Long story short, evidence demonstrates that the Antarctic continent used to be 2,000 miles away from the South Pole (about 30° from the pole) in a temperate zone and may have been, according to Hancock, the home of a seafaring civilization that had traveled and mapped the Earth. It’s now buried under ice. I find the explanation plausible, but I wonder how much the science and research has progressed since the publication of Fingerprints. I have not yet picked up Magicians of the Gods (2015) to read Hancock’s update but will get to it eventually.
Without having studied the science, several competing scenarios exist regarding how the Earth’s crust, the lithosphere, might drift, shift, or move over the asthenosphere. First, it’s worth recognizing that the Earth’s rotational axis defines the two poles, which are near but not coincident with magnetic north and south. Axial shifts are figured in relation to the crust, not the entire planet (crust and interior). From a purely geometric perspective, I could well imagine the crust and interior rotating as different speeds, but since we lack more than theoretical knowledge of the Earth’s liquid interior (the inner core is reputedly solid), only the solid portions at the surface of the sphere offer a useful frame of reference. The liquid surfaces (oceans, seas) obviously flow, too, but are also understood primarily in relation to the solid crust both below and above sea level.
The crust could wander slowly and continuously, shift all at once, or some combination of both. If all at once, the inciting event might be a sudden change in magnetic stresses that breaks the entire lithosphere loose or perhaps a gigantic meteor hit that knocks the planet as a whole off its rotational axis. Either would be catastrophic for living things that are suddenly moved into a substantially different climate. Although spacing of such events is unpredictable and irregular, occurring in geological time, Hancock assembles considerable evidence to conclude that the most recent such occurrence was probably about 12,000 BCE at the conclusion of the last glacial maximum or ice age. This would have been well within the time humans existed on Earth but long enough ago in our prehistory that human memory systems record events only as unreliable myth and legend. They are also recorded in stone, but we have yet to decipher their messages fully other than to demonstrate that significant scientific knowledge of astronomy and engineering were once possessed by mankind but was lost until redeveloped during the last couple of centuries.