Cave near Banda Aceh holds stunning tsunami clues

This was sent by a pal in the UK . It has fascinating clear evidence of tsunami activity going back in time.

A cave on the northwestern coast of Sumatra holds a remarkable record of big tsunamis in the Indian Ocean stretching back thousands of years.
http://www.bbc.co.uk/go/em/fr/-/news/science-environment-25269698 

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