The weight redistribution from the melting ice would have caused giagantic earthquakes, volcanos and tsunamis all over the world. The northern areas of the world are still slowly rising and some southern areas are subsiding because of the weight redistribution.
I don’t know when the Tula Rosa Basin was formed, but weight redistribution could have been the mechanism. It was a large bulge (mountain range) that cracked north-south on both sides, the sides moved apart and the middle fell in. I was impressed at how far it fell. If that is what happened to Atlantis, it could now be under many thousands of feet of water.