According to a new study, a massive megatsunami has occurred in the Cape Verde islands off the coast of Africa around 73,000 years ago.
The theory suggests that the tsunami was triggered by falling of large part of the volcanic island of Fogo into the ocean. The falling of land into the ocean produced as massive as 300 feet high waves that travelled a distance of around 30 miles to Santiago Island, where it could have caused indestructible damage.
Scientists say that when the waves hit the Santiago Island, it could have surged all the way over a 600-foot cliff, achieving the astounding height of 900 feet. This is not it, but they also believe that the wave have scoured massive boulders from below and carried them to the top of the plateau – where they would be found by scientists many thousands of years later.
The study was followed by question, which the lead researcher of the study, Richardo Ramaldo had about the massive boulders on the plateau of Santiago, which ends in a very steep cliff. In 2007, when Romaldo was at Santiago, he was unclear how the boulders got up there.
A few years later, a different team of scientists has published a study that there might be a massive tsunami in the area. However, their study indicated on a tsunami that impacted fairly low level, rather than the top of the plateau.
The collapse of the large part of volcanic island of Fogo added evidence to the tsunami event. Furthermore the sea floor in the area also shows the evidence of a massive rock avalanche, which scientists think could have caused the megatsunami.
The idea to megatsumani is controversial, with the scientific debates centering on ambiguous evidence for the phenomenon. An alternate theory suggests that the collapse of the large part of the Fogo Island may not have happened at once and it was more a gradual process.
Ramalho’s team has used cosmogenic techniques to date how long the rocks that weight around 700 tons, have been sitting on the plateau. The results correlated with the time of Fogo’s collapse.
The researchers also said that there are volcanic islands that could theoretically produce similar event in future.