facebook
twitter
rss
account
search
search
 

Ancient supervolcano in Hong Kong surveyed

Aug. 31, 2012 at 7:21 PM   |   Comments

HONG KONG, Aug. 31 (UPI) -- Hong Kong geologists say they've mapped out the extent of an ancient supervolcano in the territory, the first such discovery of its kind in southeastern China.

Located in the southeastern part of Hong Kong, the ancient supervolcano is tilted on its side by about 30 degrees and had an original diameter of about 11 miles, the Hong Kong Civil Engineering and Development Department reported.

Geologists suspect it's the same type of modern-day collapse caldera that formed Taal crater in the Philippines, and Tambora and Krakatoa volcanoes in Indonesia, but on a much larger scale, China's official Xinhua News Agency reported.

A "supervolcano" is defined as one capable of emitting more than 240 cubic miles of ash, Denise Tang, geotechnical engineer with the department said, adding there were about 50 supervolcanoes on record in the world.

The Hong Kong example, known as the High Island Supervolcano, last erupted 140 million years ago, and erosion and weathering have removed most of the volcanic rocks until only a remnant remains, geologists said.

© 2012 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
Most Popular
1
North Dakota forks over $3 million for mummified dinosaur North Dakota forks over $3 million for mummified dinosaur
2
Dude! Company floats fly hoverboard Dude! Company floats fly hoverboard
3
Weather satellite outage threatens to foul forecasts Weather satellite outage threatens to foul forecasts
4
Mental rest and reflection key to better learning Mental rest and reflection key to better learning
5
Ancient Europeans couldn't drink milk for 5,000 years Ancient Europeans couldn't drink milk for 5,000 years
Trending News
Around the Web
x
Feedback