Tim Cullen has posted some ideas about the meaning of a couple of ancient maps of the Mediterranean region attributed to Eratosthenes and Ptolemy here. Growing seas to me suggests sea-level rises as a first pass hypothesis to explain the ancient maps, so I loaded up the 2014 global bathymetry in Radian and zoomed into the Mediterranean region, Figure 1 below.
If the sea levels are dropped to the very light blue continental shelf we have a massive increase in land and a reduction in the Mediterranean Sea, Figure 2 below, using the blue line as a boundary. If we reduce sea level further to the yellow line, Figure 3,
then this may have been pre Roman coastline.
The North Sea seems to have been land during Roman Times, and if people were living in that area and then after an enormous global catastrophe sea levels started rising, then scurrying to highlands would be natural for the survivors. Perhaps this is where the Anglo-Saxons were originally, or could it have been the Vikings, who having their homelands inundated radiated outwards settling France, Eastern England and western Russia?
Studying the bathymetry near Istanbul, (the old Constantinople), I noticed some deep linear depressions immediately to the south and west, and wondered whether these depressions were excavated by Justinian’s Comet as it caused grief among the peoples living in the region. Velikovsky mentioned that both the Hebrews and Arabs were originally Venus, or comet, worshippers.
I’ve put a question mark in the Adriatic Sea since I’m not sure whether it was once land, and subsided by the eruption of Santorini or whether it is slightly deeper than the shelfs, since it appears borderline.
Unexplained is how topographic depressions are formed in the first place to form lakes, seas and oceans. An initial sialic crust over more mafic phases at depth will, on expansion, form depressions providing our understanding of the geology of the oceans are correct. Many continental type rocks have been dredged from the ocean floor, but are those rocks actually enormous volumes of erratics dumped during some earlier catastrophe, or are they really truly in-situ crust? Outcrop is not generally amenable to dredge sampling while erratics definitely are, and the gravel deposits on the Surtsey Island beaches make the issue even more complex.