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The yellow dot marks a very interesting 'anamoly'. In 2007 scientists found a deep 'wound' in the Atlantic seabed. It covers thousands of square miles. And here the Earth's crust is missing, exposing the mantle below it. Again this exonerates Plato. He alluded to Atlantis being struck by an asteroid or comet.
The blue dot indicates two deep 'puncture marks' in the seabed in the West Atlantic. Otto Muck, in his The Secret of Atlantis [1976, 1978; pgs 147, 151-154] gives some fascinating data. They are roughly oval, and aligned NW-SE. With a “thrust wall in the southeast”. This indicates that the bollide, which Muck says was an asteroid [not comet], came from the northwest. Each is nearly 23,000 ft [7000 m] deep. They cover an area of about 77,000 square miles [200 square km].
The Carolina 'Crater Bays' are also curious. Muck says there are about 3,000 on land [10,000 if the submarine ones are included]. They form an “elongated ellipse which…represents a total impact area of at least 63,500 square miles (165,000) sq km.” About half are nearly 1300 ft [400 m] long; over a hundred are 5250 ft [1600 m]. They are mainly aligned NNW or NW to SE.
A comet or asteroid, travelling anti-clockwise, has been suggested as the most likely cause. They have been dated at about 10,000 to 17,000 years old. They radiate roughly in a trajectory from Lake Michigan into the Goldsboro Ridge area of North Carolina.
I have indicated several Tablemounts [aka Seamounts or Guyots] on the colour map. The most prominent is the Great Meteor Tablemount at about 4,000 m (13,120 ft} high, and about is 110 km (70 mi) across. They are caused by lava rising up through the oceanic crust. And flattened by erosion, waves and atmospheric processes.
They, together with the Azores - the line of islands at the top of the red rectangle, show Atlantis was volcanic. According to global legends, and Mayan Art [above] that was one of the causes of its demise. 
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There is more evidence to add. Crucial in pin-pointing Atlantis:-
A report in Ancient American Magazine [September/October 2001 issue] said that, on 7 September 2001, a Spanish/American team looking for oil
"250 miles southwest of the Azores...researching a 90-kilometer ledge with a central temple supported by three stands [rows] of nine pillars about 3 feet in diameter supporting a flat stone roof about 20 feet wide and 30 feet long. There are the remains of five circular canals [Plato?s Royal City had three water rings] and bridges, plus four rings of structures [including the acropolis, Plato's had three] like the temple in between. it is roughly 2,800 feet deep in the Mid-Atlantic Trench... ."
This is a vital discovery, for it verifies the sighting of a mysterious island in 1882. In March of that year Captain Robson and the crew of encountered a barren and uncharted [it was open sea several thousand feet deep on maps]. The bearings - 31o 25?N, 28o 40?W - place it at about the location of Zelitsky's city. Once in New Orleans, their destination, a sailor told the Times Picayne they'd seen the ''crumbling remains'' of ''massive walls''. The artefacts found included ''bronze swords, rings, mallets'', carvings of heads and animals, skeletal remains in urns, and even a mummy in a stone sarcophagus!
Just a month later, Captain James Newdick and the crew of the Westbourne saw the same island - at bearings 25o 30'N, 24oW. Their story appeared in the New York Post. The two sets of co-ordinates hint at a sizeable landmass, which could only have surfaced as the result of major seismic activity. In fact, the sailor from the SS Jesmond described a plateau of smoking volcanoes several miles from their landing point, and that the ground was riven by lethal chasms. In both instances there were mudbanks and vast shoals of dead fish.