Madagascar tsunami deposits show wave heights exceeding 200 meters from Indian Ocean impact. Tsunami wave deposits found on Madagascar southwest coast at 94 meters elevation Escarpment shows deposits on both upper and lower sides Upper escarpment elevation 157-180 meters; lower side 145 meters
Tsunami deposits on Madagascar's southwest coast include deposits at elevated locations, with an escarpment showing deposits on both sides. A wave overtopped significant elevation differences. Chevron dune formations at Madagascar's southern tip reach up to 185 meters in height, with research ongoing into whether these represent mega-tsunami deposits or giant aeolian dunes. A potential impact crater on the Indian Ocean floor has been proposed as a possible source for a catastrophic wave event.
Key Facts
- Tsunami wave deposits found on Madagascar southwest coast at 94 meters elevation
- Escarpment shows deposits on both upper and lower sides
- Upper escarpment elevation 157-180 meters; lower side 145 meters
- Wave overtopped 100+ meter elevation difference
- Burkel Crater identified on Indian Ocean floor as impact source
- Back azimuth analysis points to crater location
Source: The Finger Lakes All Radiate From The Same Spot by The Randall Carlson