Theory on the Mediterranean Sea

There is a theory that, over the past few weeks, I have been formulating and that now I would like to share with you. At first it just seemed like an idea, like one of the ones that people think up while doing JJT. But since studying more on it, I’ve found that it actually could be possible.
The theory: The Mediterranean Sea, and possibly the Black Sea as well, were not really seas originally but were formed with the sinking of Atlantis.
Now, before you start saying anything, let me present the facts to you that support my argument and then you can decide for yourself. But first, let me tell you how the idea came to me.
I was taking some extra Word during quiet time and, coincidentally, was reading that old letter about Atlantis and the Canaries. In it, Dad states:

“WE WERE DISCUSSING THE CANARY ISLANDS, THEIR ORIGIN AND HISTORY, wondering how long people had lived here, and we remembered that legend had it that the Canaries were the only remaining part of the Lost Continent of Atlantis which was supposed to have sunk beneath the Atlantic Ocean ages ago.--And I was wondering who the people are that live here and how they got here.

2. SUDDENLY I SAW THE SEVEN ISLANDS AS SEVEN MOUNTAINS with many people climbing up the mountains to escape from the sinking continent!”

Now, assuming his vision was true, we may logically assume that the Madeira Islands are also former mountains, which leads us to take a look at the first fact.
Fact: Both the Canary Islands and the Madeira Islands are only a hundred miles from the Iberian Peninsula; the Canary Islands are about sixty miles away from Western Sahara. The water around both island chains—but especially the Canaries—is significantly shallow, almost as shallow as the Mediterranean itself.
Now, I would like to draw your attention to the map below and ask you that—in order to fully understand what I am saying—you download it so you can zoom in and out:






As you can see on the second map, next to the upper-left corner, lay both islands chains of which I have spoken of. Some miles to the east, there is a range of elevated terrain that stretches from the southern cost of Portugal towards the Madeira Islands.
If you will now look at the first map, you will notice that the range forms an undersea plateau-base that stretches around both sides of the Iberian Peninsula, north to the southern beaches of France, and east towards Sardinia. On closer inspection of the second map one will also notice that a similar plateau begins near the Canary Islands and, as seen on map one, you will find that it reaches the western coast of Morocco and from there clings to North Africa and continues east all the way to the Nile Delta.
It is upon this ground that I make the first defense of my argument. As anyone that studies geography will agree, plateau bases are the precursors of mountain ranges. Plateaus are heralded by plains, and plains by wetlands or valleys. This order does not necessarily contain all of the lower elements, but such is usually the case. Now, knowing this, it brings us to the question: what lies further into the median of the Mediterranean Sea, seeing as these plateaus do not reach far into the interior? The answer: lowlands. Going south by southeast from Italy and the isle of Sicily, and back northeast on the vertex of Crete, we can see a large swath of lower-level lands that reach almost to the shores of Palestine and Turkey.
Just south of Crete, in the Libyan Sea, and at almost equal latitude with Israel’s northern border begins another rise in the ocean bed. Following the longitude through the center of Crete it continues to rise and cuts all the way and makes up the submerged floor of the Aegean Sea. This bed—given the geography—is similar in structure to many of the highland regions of Europe; and it is a known fact that on both the eastern coast of Greece, and the western coastline of Turkey, it is all mountainous territory. The same formations can be seen, though not to the same degree, on the western shores of Italy and the north coast of Sicily.
As for the Black Sea, the formations are entirely the opposite. If you will take a look at the first map, you will notice that there is a ring of depression, similar to the underwater plateau ring around the Iberian Peninsula and, further into the sea, comes another depression in elevation resulting in even deeper waters.
Now, knowing the basic, submarine geography of both seas I would like to make a hypothesis. Suppose a giant dam were to be placed inside the Straight of Gibraltar, and the water in both the Mediterranean and the Black seas were drained. What would we then notice about the geography? All around the former coast of Southern Europe we would notice plateau and highland regions that lead directly to some of the highest elevated portions of the continent. On the former coast of North Africa there would be the same occurrence, but not in such drastic measures, as that coastline is less elevated then that of most Southern Europe. Also, with the water drained, one would find the mountainous regions of Turkey and Greece combined to form a new mountain range, one that has remained underwater simply because it was of lower elevation then the coastlines of both those countries.
It is upon elevation and depression that I make my second defense. As looking at the first map will easily show, most parts of all continents touching the Mediterranean Sea are elevated past normal sea level. That would mean that, if the hypothesis is correct and water from the Atlantic flooded the Mediterranean Basin with the sinking of Atlantis, the coastline of these continents are at their present state simply because their elevation allowed them to escape the rising waterline. The few exceptions to this argument of extensive elevation are the coasts of Libya, Lebanon, Israel, and parts of Egypt. However, it because these coasts are at the tail end of a submarine valley, but as you can see in the second map, the ocean bed does rise some before it touches any of these countries, thus explaining how they would escape submergence. The said coastlines of these countries are, coincidentally, well above sea-level as well in most places.
The third defense of my hypothesis is the Nile Delta and its origins. It is a known fact that the Nile River flows outward from its beginnings in Lake Victoria and out into the Mediterranean Sea. However, back to the Hypothesis of Draining, if one takes the water out from the Mediterranean what do they find? North they will find the aforementioned highlands of the Aegean, but what about south of Crete? Conclusion: valley. A well, fed valley too it would have been, with the Nile River flowing straight into it. It would have extended from near to the toe of Italy eastwards to the western coast of Asia Minor, a perfect valley that led up to the rugged terrain of the mountains north between Greece and Turkey.
Therefore the conclusion: Atlantis stood as a land barrier between the Atlantic Sea and the Mediterranean Basin. When Atlantis sunk, the barrier was lost and a vacuum was created in which water rapidly poured in, swallowing the entire Basin and submerging its former geography. Within a matter of days the water overran the lower peaks of the Aegean Mountain range, forming what is now known as the Aegean Sea and, soon afterwards flooded the second valley that is now known as the Black Sea. The sea levels discontinued its rise once the vacuum was filled and the result was the coastline we now know of today.