A second shield volcano, Racecourse knob is to the left in the photo.

If an accurate description, magma from the sub-lithospheric hotspot source migrated into the lithosphere and is then carried along with the plate until the connection with the source is broken and the next province is charged with new magma. Volcanics are mostly located in roughly parallel strings with oldest volcanoes to the north and the youngest to the south. [20], There is a sand bypassing system operating at the mouth of the Tweed River.

Latitude: -28° 23' 26.82" SLongitude: 153° 16' 0.11" E, Satellite map of Tweed Volcano in Google Maps. Tweed Volcano is a partially eroded Early Miocene shield volcano located in northeastern New South Wales, which formed when this region of Australia passed over the East Australia hotspot around 23 million years ago. Tweed Volcano is a partially eroded Early Miocene shield volcano located in northeastern New South Wales, which formed when this region of Australia passed over the East Australia hotspot around 23 million years ago. Victoria is dominated by the relatively recent Newer Volcanic field. The central volcanoes are generally old and eroded. Most of the volcanic activity in Tasmania is quite ancient. Image courtesy Nemeth, et all. Over the past 20 million years the vast majority of the material ejected by the Tweed Volcano has been eroded away by the Rous and Oxley rivers which feed into the the Tweed River which ultimately winds its way across the valley floor eventually entering the sea at Tweed Heads. Those that are parallel are listed from west to east. ( Log Out /  Different nations use the language differently even when (nominally) speaking the same language (English in this case). Hot ash and gas rushed down the mountainside and 62 people were killed. As the mountain's central vent cooled it shrank, forming a depression at the top that has greatly eroded. Past activity throughout the zone dates from 70 Ma to as recent as 4,300 years ago.

Change ), Please

Image courtesy Meeuws, et all. [16] The southern Gold Coast beaches were soon faced with intense erosion during storms which was not replenished. Gaps exist when the lithosphere is thicker than 150 km. The highway crosses many rivers along its route, with the Tweed being the last one before reaching the holiday destinations of the Gold Coast, just on the other side of the Queensland border. Other locations have had 5 – 10 Ma between eruptive episodes.

The order failed to stop the channel from shoaling and instead necessitated regular dredging and completely inhibited the longshore transport of sand northwards. The articles quoted Professor Bernie Joyce pointing out that the chances of a future eruption were more a matter of when rather than if. The scientists believe the chain is connected to the actions of a single hot spot under Australia during its move north. Location of three active Australian hot spots. Big Volcano Visitor Map. The Newer field in Victoria is leaving the vicinity of its underlying thermal plume system / low velocity zone. Image courtesy http://www.firstpr.com.au/daylesford/00-daylesford-general/. From the middle reaches of its course, the state boundary between New South Wales and Queensland is located approximately 10 kilometres (6.2 mi) north of the Tweed River. The leucitite provinces contain mafic, high-K minor intrusives. Locality map of towns and villages in the Ballina, Byron Bay, Tweed Valley, Kyogle, Casino and Gold Coast hinterland region of NSW and QLD, Australia. They are chemically and spatially distinct, being on the western part of the EAVZ. Volcanic vents were active 58 – 5 Ma. Image courtesy NSW National Parks and Wildlife Service. [17] At Tumbulgum, the Rous River joins the Tweed. Well worth your time to read. Warning. The used book itself is available from Amazon for a mere $842 US for hardcover or $41 US paperback. It also coincided with a brief period of reduced northward plate motion as the plate was briefly deflected westward. https://en.wikipedia.org/wiki/Australian_Plate.

It stretches 4,000 km north and south and is up to 500 km wide, mostly parallel with the eastern Australian coast line.
Heavily eroded Warrumbungles volcano in New South Wales. In the 23 million years since the volcano was active, erosion has been extensive, forming a large erosion caldera around the volcanic plug of Mount Warning. https://volcanohotspot.wordpress.com/2018/11/12/nisyros-re-visited/, most excellent. 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. Shortly afterwards, Mr. Stirling and I landed on the island with our guns. One of the places in the world with volcanic activity we haven’t covered is Australia. A map showing the area at Pottsville which has been declared a dog prohibited zone. Lava field volcanic activity in Queensland and Victoria seem to be concentrated in two periods – 70 – 14 Ma and 5 Ma to recent.

This volcano erupted around 23 million years ago.

here Each year the river hosts a number of major aquatic events. The volcano attracted moist air from the sea (hence the Aboriginal name Wollumbin meaning “the Cloud Catcher”) and generated significant rainfall that washed away the lava, leaving large volcanic plug – Mt Warning (Wollumbin) and the semi-circular caldera basin. Undara is in the center of the photo. Mount St. Helens erupted in May, 1980. It has a mature wave dominated, barrier estuary. Queensland to the north and the Newer Volcanic field in Victoria to the south are both recently active volcanic fields on the continent.


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