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Undersea 'Mordor' found off coast of Australia


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One Ring to Rule Them All
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« on: January 20, 2018, 04:35:39 pm »

Can Hobbits Swim? 'Mordor Under the Sea' Found Off Australia
By Brandon Specktor, Senior Writer | January 19, 2018 01:51pm ET


 


Can Hobbits Swim? 'Mordor Under the Sea' Found Off Australia
Researchers discovered 26 underwater volcanoes that date to 35 million years ago near Australia.
Credit: P. Reynolds, S. Holford, N. Schofield, and A. Ross

Today in news best suited for sneaky little Hobbitses and Shire-folk, scientists unveiled a map of a faraway volcanic realm that has a distinct look of Mordor about it. Unfortunately for any ring bearers, the molten landscape has probably been hidden underwater for millions of years.

The "Tolkienesque" region of submarine volcanoes buried beneath the sea south of Australia was discovered by a team of researchers from the University of Adelaide in Australia, the University of Aberdeen in Scotland, and the Commonwealth Scientific and Industrial Research Organization (CSIRO) in Australia. The team employed 3D seismic reflection, a geo-mapping technique that uses seismic waves to measure subsurface structures. With this technology, the researchers identified 26 separate volcanoes buried roughly 820 feet (250 meters) beneath seabed sediment. Some of the ancient volcanoes reach up to 2,000 feet (625 m) in height and are surrounded by several lava features never before studied underwater, the study said.

"The technology we have used is similar in many ways to what is used to produce ultrasound images of babies, but for the Earth," study author Nick Schofield, a senior lecturer at the University of Aberdeen's School of Geosciences, said in a statement released Wednesday (Jan. 17). "By using this technique, we have a unique insight into a landscape that has remained hidden for millions of years." [Dark Waters: The World's Most Mysterious Places on The Seas]

In the study, which was published in the November 2017 edition of theAmerican Geophysical Union's journal Geochemistry, Geophysics, Geosystems, researchers dated the volcanoes to the Eocene epoch, which took place roughly 50 million to 33 million years ago. The network of remarkable lava flows surrounding the volcanoes — known collectively as the Bight Basin Igneous Complex — was likely created during an undersea eruption roughly 35 million years ago, the study said.

"By using data acquired as part of oil-exploration efforts, we have been able to map these ancient lava flows in unprecedented detail," Schofield said. From this seismic data, the researchers determined that some of the ancient lava flows measure more than 21 miles (34 kilometers) long and 9 miles (15 km) wide.

Across these miles of terrain, the flows branch into pathways, rise into plateaus, plunge into trenches and spread into elliptical-shaped "islands" of hardened lava. Researchers compared these islands to land-based lava features known as "kipukas," isolated hills or plots of slightly elevated land that become completely encircled by lava after eruptions. Features like these have never been described by underwater seismic data before, the study said, so this new study gives researchers a fresh look at the behavior of submarine eruptions.

At press time, no Nazgűl were observed patrolling the volcanoes.

Originally published on Live Science.
https://www.livescience.com/61475-underwater-mordor-discovered-australia.html
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One Ring to Rule Them All
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« Reply #1 on: January 20, 2018, 04:36:26 pm »

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