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]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Tweed River (New South Wales) — The Tweed River is a short river on the north coast of New South Wales, Australia. Its drainage basin consists mostly of the erosion caldera of the Tweed Volcano, a huge extinct volcano of which Mount Warning is the volcanic plug. The branches of …   Wikipedia

  • Shield volcano — A shield volcano is a large volcano with shallow sloping sides. The name derives from a translation of Skjaldbreiður , an Icelandic shield volcano whose name means broad shield , from its resemblance to a warrior s shield. Information Shield… …   Wikipedia

  • Mount Warning — (aka Wollumbin) Mount Warning at sunset. Elevation 1,156 m (3,793 ft) …   Wikipedia

  • Murwillumbah, New South Wales — Murwillumbah New South Wales Partial view of town and Tweed River, 2008 …   Wikipedia

  • Mount Warning National Park — Mount Royal National Park IUCN Category II (National Park) Coordinates …   Wikipedia

  • Caldera — A caldera is a cauldron like volcanic feature formed by the collapse of land following a volcanic eruption. They are sometimes confused with volcanic craters. The word comes from Latin caldarium , meaning cauldron (hot bath). In some texts the… …   Wikipedia

  • Tamborine Mountain — landscape Elevation 525 m (1,722 ft) …   Wikipedia

  • Scottish place names in Australia — This is a list of placenames in Scotland which have subsequently been applied to parts of Australia by Scottish emigrants or .Australian Capital Territory* Campbell, Australian Capital Territory (Robert Campbell) * Duntroon, Australian Capital… …   Wikipedia

  • Gold Coast hinterland — The Gold Coast hinterland is an area of South East Queensland, Australia that comprises the Tweed Range, Nimmel Range, Tamborine Mountain, Numinbah Valley, eastern parts of the McPherson Range and western parts of suburban Gold Coast.[citation… …   Wikipedia

  • Nightcap National Park — IUCN Category II (National Park) Protestor Falls, Terania Creek section, Nightcap National Park …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”