The Supervolcano in Hong Kong; The High Island Caldera

One of the largest supervolcanoes on the planet is located in Hong Kong. This city is built on top of several hundred meters thick of ash which formed in a single supermassive eruption. It once created an 18 kilometer wide crater in the ground which was more than a kilometer deep. Although extinct, this supervolcano left behind more than 20,000 hexagon shaped columns which have a peculiar origin. This video will discuss the supervolcano in question which is known as the High Island Caldera.

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Graphics of eruption dates are courtesy of the Global Volcanism Program, Smithsonian Institute. https://volcano.si.edu/

0:00 A Supervolcano in Hong Kong
0:43 The Caldera Rim
1:14 Geologic Setting
2:36 The Supereruption Occurs
3:44 Formation of Hexagonal Columns

Google Earth imagery used in this video: ©Google

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