19 May 2010

Disasters: Santorini

By Lindsay Townsend

In 1613 BC, give or take a couple of decades (scholars lock horns over the dates), the circular Aegean island of Thera (now Santorini) was almost obliterated from the earth. With the force of many Krakatoas, the volcano which lay beneath it blew its top in an explosion which threw most of the island into the sky and scattered it over and beyond the sea. The lava thrown out of the volcano with such force fell back already aerated, as a thick layer of light pumice which lies over the remains of the island to this day and can be seen in the curved cliffs like a thick pastry crust on a pie bitten by a giant. The town of Aktoriri, once a Minoan settlement, lies excavated from the ash, a Theran Pompeii.

Santorini from space, showing the centre of the island blown away by the eruptionThe collapse of the sea floor beneath Thera produced a tsunami that swept across the Aegean. The north coast of Crete was devastated, with coastal towns like Palaikastro completely inundated, the palace at Amnisos damaged and pumice falling on Mallia. Molten lava thrown out of the crater flowed out across the sea, cooled and sank, leaving over five hundred square miles of the sea floor around Santorini covered in a thick layer of volcanic rock.

A street in the Bronze Age town of AkrotiriThe Mediterranean is in constant geological turmoil. Think of Etna and Vesuvius, the earthquakes which are slowly unzipping the crust of northern Turkey towards Istanbul. There are seething thermal vents on the seafloor a few miles from Santorini now, and the Aegean itself will disappear one day, crushed between Africa and Europe in the relentless dance of tectonic plates. This was the largest volcanic eruption in human history until Tambora exploded in Indonesia in 1815, and its after-effects are still not yet understood.

The edge of the volcanic caldera, SantoriniAs for the date of 1613 BC: two olive branches, the remnants of a walled olive-grove alive on Thera when the eruption blasted away the land next to it, were found intact under the pumice by archaeologists and radiocarbon-dated. Olive trees are survivors.

Two of Lindsay Townsend's books, BRONZE LIGHTNING and BLUE GOLD, are set in the Bronze Age Mediterranean and ancient Egypt. Her latest medieval, A KNIGHT'S ENCHANTMENT, will be published in June.

3 comments:

Blythe Gifford said...

I spent several days on Santorini years ago. The caldera, which was the volcano's crater, is now part of the sea. And the town of Aktoriri is amazing to see. Thanks for recounting the tale.

Linda Banche said...

Great post, Lindsay. I like reading about the geological events that shaped history.

librarypat said...

Interesting post, Lindsay. I am surprised I had not heard about this volcanic eruption or the excavation of the town of Aktoriri. In high school and college I was interested in ancient cultures and disasters like Pompeii, and read extensively about them. All the volcanic and earthquake activity lately makes one wonder how more inactive volcanoes are ticking time bombs. Here in the US most are near major population centers. Yellowstone National Park is spectacular, always full of visitors, and the most active geologic area in the country.
Santorini sounds like a place I'd like to visit. If I ever get to make my dream trip to Pompeii, I will include it in the trip.
Thanks for an interesting post.