The "Keystone Atlantis" Theory: Was the breakup of Pangea a structural collapse caused by a drying continent?

I’ve been developing a theory that challenges the "slow and steady" model of continental drift. I want to put this out there for discussion and to time-stamp the specific mechanics of this hypothesis. The Theory: The Desiccation-Collapse Model of Pangea Standard geology says Pangea broke apart over millions of years due to mantle plumes. But what if the trigger was top-down structural failure centered on a landmass we call "Atlantis"? The Mechanics: The Drying (Desiccation): As Pangea formed, its vast interior became a hyper-arid desert. This caused the central "Keystone" landmass (the area between modern Africa and North America) to lose internal hydration. Volumetric Shrinkage: Just like a drying sponge or a cracking mud puddle, the crust in this central zone began to shrink and become brittle. The Vertical Collapse: This shrinking caused the central "Atlantis" block to lose its buoyancy and sink vertically into the mantle. This created a massive tectonic vacuum. The Hydraulic Wedge: Once the global ocean breached the rim of this sinking basin, trillions of tons of water rushed in. The weight of this water acted as a physical wedge, snapping the plates and shoving the continents apart in a rapid, catastrophic event. The Evidence: The Mirror Mountains: When you reassemble Pangea, the Appalachian Mountains (USA) and the Anti-Atlas Mountains (Morocco) form a single, unbroken chain. In this theory, they aren't just "matching" pieces; they are the shattered rim left behind when the center dropped. NOAA Gravity Data: Satellite gravity maps (like those from NOAA/NASA) show density anomalies under the Atlantic seafloor that look like subsided continental crust, not just volcanic basalt. The Modern Blueprint: We see this happening right now in the Afar Triangle of Ethiopia—a drying, sinking desert that is currently rifting to allow the ocean in.

In this model, Atlantis wasn't just a sunken island; it was the structural keystone of the world. Its collapse is the literal "Great Flood" recorded by every culture—the eyewitness account of the day the Atlantic Ocean was born.

1. "Continental crust is too light to sink into the mantle" (Isostasy) The Debunk: Geologists say continental crust (granite) is like a cork; it's too buoyant to sink into the denser mantle. The "Keystone" Answer: My theory doesn't claim the granite floated away or vanished. It claims that extreme desiccation (drying) caused the crust to shrink and crack, losing its structural volume. This created a vertical displacement—the land didn't "sink" like a stone in water; it collapsed like a bridge under its own weight because the drying process made it brittle and structurally unsound. Earth Science Stack Exchange Earth Science Stack Exchange +2
2. "Continental drift happens at the speed of fingernails" (Uniformitarianism) The Debunk: We measure plate movement at roughly 1–4 inches per year. The "Keystone" Answer: Those are current speeds. In a Catastrophic Plate Tectonics model, the initial "snap" of the Pangean rift would have been a high-energy event. If the central Atlantis block dropped suddenly, the surrounding plates would have rushed to fill the void at "sprint" speeds before the mantle's viscosity slowed them down to the crawl we see today.