|The formation of earth’s submarine canyons a billion years ago|
A crucial aspect of my theory that Terra Australis Incognita is Plato’s Atlantis is that the submarine topology of New Zealand matches Schöner’s 1515 map of Terra Australis Incognita (see Figure 1.9 in Section 1.0.2). That would mean that New Zealand and Australia must have been at least 4000m higher than its present level for the ocean floor (which would be the central plateau of Atlantis, see Figure 1.8) to have been above sea level. As proof of this I argue that the riverine canyon running down the Bounty Trough of New Zealand could hardly have been formed by turbidity currents as scientists appear to believe (see Figures 1.17a-1.17g). My argument is based on the fact that the slope of the Bounty Trough is about 0.4° (a drop of 4 km to 7 km over a 900 km distance) and that it would have been impossible for the fine sand washed into the ocean from the continental shelf to carve out this canyon. In other words, the Bounty Trough must have been above sea level before Atlantis was sunk by the impact of a comet (at the Scotia Plate).
When I proposed this theory on related forums, I was quickly asked whether I really believe that all submarine canyons around the world must also have been above sea level at the time of the impact, which of course is not the case, and I had no answer. In my theory I propose that the crust of the earth around Antarctica must have been at least 4 km higher before the impact of a comet forced it downward underneath the sea. Apart from the associated flood, the rest of the world suffered no similar consequences. So, if I reject the turbidity current theory (it is absurd in the case of the Bounty Trough and even more so in the case of the Agadir Canyon, where turbidity currents are supposed to have carried landslide debris over the ocean floor for 1800 km at an average slope of less than 0.2°!), but cannot explain how submarine canyons elsewhere were formed, does it automatically dismiss my Terra Australis theory?
I simply had no answer until it recently dawned on me that the answer may indeed be that all submarine canyons around the world were once above sea level, or at least, sea level as we understand it today. That time would have been when the surface of the earth was still too hot for any water to accumulate on its lower surfaces. All the water of the ocean would effectively have existed in the atmosphere, in billion-year-long cycle of water vapour condensing in the upper atmosphere, falling down to the continents in the form of rain, running down the edges of the continental shelves and cutting deep canyons in it, and being evaporated again when it reaches the terrifically hot ocean floor (see Figure 1 below). This would have continued until the crust of the earth had cooled down enough for the oceans to begin forming. In the end most of the water in the atmosphere condensed and the oceans were flooded, covering the canyons cut into the continental shelves hundreds of millions of years before. Does it sound feasible? I would really like to hear the opinions from experts in the geological development of the Earth, so if you know any, could you please ask them to comment?
Figure 1. Suggested formation of submarine canyons in continental shelves all over the world, a billion years ago