DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY DETLEV VAN RAVENSWAAY / SCIENCE PHOTO LIBRARY
Santorini volcanic deposits. Man examining the tephra (volcanic ash) deposits left by the Santorini volcanic eruption of around 1500 BC. This eruption took place on the Mediterranenan island of Santorini (also called Thera) in what is now Greece. It was one of the biggest volcanic eruptions on Earth in the last few thousand years, and the tephra layer is over 60 metres thick. It is thought that the effects of the eruption may have caused the collapse of the Minoan civilisation on Crete, 110 kilometres to the south.
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