Tsunami May Have Destroyed Neolithic Coastal Villages
Monday, January 8, 2007
Keywords: tsunami, volcanology, geophysics simulation, Mediterranean
Summary: An avalanche on Mount Etna around 8000 years ago triggered a huge tsunami, and both geological evidence and computer models indicate that it devastated most of the Mediterranean coast within hours. Since then, sea level has risen about ten meters, so much of the geological evidence is hidden underwater. Neolithic villages along the coast would have been ravaged, highlighting the need for a warning system today.
Above image: A computer model of a tsunami forming approximately 8000 years ago. Credit: INGV.
Excerpt from Discovery News:
Ancient Tsunami Ravaged Three Continents
By Rossella Lorenzi
A volcano avalanche in Sicily thousands of years ago caused a gigantic tsunami, which engulfed the Mediterranean Sea and ravaged the coastline of three continents in less than four hours, according to geological evidence and computer simulations.
In a study entitled "The Lost Tsunami," published in the current issue of the journal Geophysical Research Letters, Maria Teresa Pareschi and colleagues at Italy's National Institute of Geophysics and Volcanology suggest that the tsunami might also have caused the mysterious abandonment of a Neolithic village. . .
Pareschi modeled the collapse of the eastern flanks of Mount Etna in the early Holocene (nearly 8,000 years ago), drawing a scenario in which six cubic miles of rock crashed into the water at a speed of 224 miles per hour.
According to the simulation, waves splashed tremendously high near the landslide area and traveled as far as the coasts of Southern Europe, North Africa and Asia Minor.
"It is hard to find on-shore evidence of such a catastrophic event because since then the sea level has increased by about 10 meters (33 feet). But we found a wealth of submarine evidence across the floor of the Ionian Sea and the Sirte Abyssal Plains in Africa," Pareschi told Discovery News.
Indeed, the simulation showed that pressure from the ancient tsunami liquefied thick layers of soft marine sediments across the Ionian seafloor and triggered a far-reaching underwater mudslide. . .
To read the rest of the article, please visit the Discovery website:
Blog Author: Ellery Frahm