Tweed Volcano

Tweed Volcano

Tweed Volcano was an early Miocene shield volcano in northeastern New South Wales, Australia. In the course of about three million years, Tweed Volcano was formed over the East Australia hotspot when this part of the continent passed over it around 23 million years ago. Its erosion caldera is the largest in the Southern Hemisphere. [ [http://www.bigvolcano.com.au/natural/wollum.htm the Caldera of the Tweed Volcano] .] Mount Warning, Tweed Valley and Byron Bay are among the remnants of this volcano that was originally over 30 km in diameter and twice the height of Mount Warning today (1,156 m). Some ash and lava was deposited as far as 100 km from the vent. Now Tweed Valley forms a large erosion caldera around the volcanic plug of Mount Warning. Despite its size, Tweed Volcano was not a supervolcano.

Notes

References

* [http://www.amonline.net.au/geoscience/earth/warning.htm Mount Warning]
* [http://www.bigvolcano.com.au/natural/lostwrld.htm Records in the Rocks. A relatively simple account of the creation of the Tweed Volcano]
* [http://qld.gsa.org.au/oreillys.pdf Green Mountains, Lamington National Park]


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