Geology of the GOLD COAST and Hinterland in Gold Coast, Queensland | Not a business
Geology of the GOLD COAST and Hinterland
Locality: Gold Coast, Queensland
Address: laguna Gold Coast, QLD, Australia
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25.01.2022 The Sprinbrook plateau on the north side of the erosion caldera of the Tweed Volcano is protected from erosion by two large flows of Rhyolite as can be seen in this photo.
24.01.2022 PLEASE WATCH IN HD UNTIL THE FINISH! This is the compilation of last several weeks leading tours to the 61g lava flow and the Komokuna ocean entry, Hawaii Vol...canoes National Park, USA. Video Courtesy EpicLava Like and Follow Learning Geology for more amazing videos. #LearningGeology | #Geology | #Volcanoes See more
23.01.2022 Currumbin Rock is a geological monument and a good place to explore the N F beds.
23.01.2022 The Gold Coast area is well known as being close to the Tweed Volcano , but not as much is known about the earlier Chillingham Volcanics, Around 200 MYA a group of Rhyolitic volcano's were active in the area running from south of Chillingham along the numinbah Valley and as far north as Tamborine Mt. One of the better examples from the period is this gorge eroded into a rhyolite flow in Back Ck at Beechmont.
23.01.2022 This photo showing lower columns supporting the middle part of the flow below the lookout.
22.01.2022 A short video of the mini Rhyolite columns
22.01.2022 originally the Numinbah Valley, below, started on the slopes of The tweed Volcano but at some point in time the waters were stolen by an eastern flowing stream as the volcano was steepest on the east side going down to sea level. The valley now starts in the saddle at the rear of the photo and is the Qld N S W border, Mt warning at rear of photo.
22.01.2022 Burleigh headland was the next old valley north to fill with flows of basalt.
21.01.2022 The early flows of basalt from the tweed Volcano moved down the existing valleys, until they reached the ocean, here at Fingal in Northern NSW, the columns below and Cook Island in the background were both part of the early flows.
20.01.2022 Around 100 MYA, the Australian continent started breaking away from Antarctica and by 50 MYA we broke away and started drifting in a northerly direction, as we moved north we drifted over a hotspot now situated inbetween Tasmania and the mainland and as we moved over this hotspot a number of Volcanoes erupted down the Qld coast, Around 22 MYA the Gold Coast area moved over this hotspot and the Tweed Volcano was formed.
19.01.2022 The larger rocks in this photo are sections of the middle of the flow, as the lower basalt columns collapsed down the slope the unsupported overhanging mid sections of the flow broke off and rolled to there present position
18.01.2022 After i notified Warwick Willmott from the Qld Geological Society of my find, he came down and inspected the Rhyolite flow and added it to the report he was doing for the Gold Coast City Council.
18.01.2022 Looking down from the Tumgan lookout in the Burleigh N P, the ledge the lookout is built on is the top of the middle section of the flow of basalt, the upper columns have collapsed and can be seen along the slopes and the shorline and now help protect the headland from erosion.
18.01.2022 A side view of the middle section of the basalt flow at the lookout showing horizontal cooling fractures and the lower vertical columns now supporting that section.
17.01.2022 The Tweed Volcano wasn't the only change to the area as we moved over the Hot Spot some 20-22 MYA. The massive heat caused the local earth surface to bulge to the point that it fractured and lava flowed up these fractures cooling quickly on its sides forming small columns. At Mt Bally i found such a fracture while bushwalking in the area.
16.01.2022 Sediments and lavas deposited off the edge of continent in a deep ocean trench
16.01.2022 This road cutting gives a good example of the folding of the Neranleigh Fernvale beds
16.01.2022 The long basalt columns still supporting the middle section of the flow above
12.01.2022 View from East Cougall with the Springbook plateau on the right and the erosion caldera on the left.
11.01.2022 Another view of the saddle at the start of numinbah Valley with Mt Warning behind.
10.01.2022 370 - 315 MYA there was a volcanic mountain chain near the edge of the continent and the continental shelf and deep ocean to the east
10.01.2022 Looking up at the basalt columns at Burleigh headland the bottom of the old valley sits just below the columns where river gravel has been found inbetween the basalt and the much earlier Mete sediments of the N F beds,
09.01.2022 Rainbow Falls pours over the upper rhyolite cliffs at Springbrook, the thick flow of rhyolite protects the lower basalt flows from erosion. The poorer rhyolite soils support a eucalypt forest rather than rainforest.
09.01.2022 A short distance downstream from Denham falls is lip Falls pouring over a lower flow of basalt.
09.01.2022 Australia is known for its unique animals like the Emu, but did you know we were once home to much bigger flightless birds? The Dromornithidae were first discov...ered in the early 19th century when initially only two species were recognised. In the 1950s at least six new species were found in central Australia. These fossils are from Dromornis planei, which was first described scientifically (as Bullockornis planei) in the late 1970s. This femur (upper leg bone) of the enormous bird is the holotype, meaning it is the first specimen recognised as belonging to a new kind of animal. Dubbed the demon duck of doom, Dromornis planei stood 2.5m tall! The oldest known dromornithid fossils are about 15-20 million years old. #FossilFriday
08.01.2022 About 315 M Y A , A major upheaval with folding and crumpling of sediments while under immense heat and pressure as the ocean plate subducted under the continental plate . these meta - sediments were thrust up to form a high mountainous terrain. these rocks are now known as the Neranleigh -Fernvale beds
07.01.2022 Looking over the erosion caldera from Springbrook with Mt Warning in the upper right
07.01.2022 Another example of the N F beds
07.01.2022 Available from Qld division of the Geological Society and i have a few copies avaliable on the gold Coast cost $15. i am also avaliable for short excursions and talks. Ian Black 0417704502
06.01.2022 Just below Lip Falls is another earlier flow of basalt, this photo showing the lower part of the flow that cooled quickly flowing over the cold ground showing cooling fractures. just above the columns is the middle section of the flow with no vertical fractures and the upper columns have already been eroded away. Back ck Beechmont
06.01.2022 At the top of the short gorge lies Killarney Falls a spectacular waterfalls that over time has worn caves into the side of the falls. It Unfortunately the area has been closed off for some time after an unfortunate accident in the area, can only hope it will reopen again.
04.01.2022 Half way down the Gwongoorool pool track at Binna Burra on the left side of the track there is cliff face of welded tuff , volcanic ash, that smothered an existing forest when it rained down 29 MYA. in the cliff face hollows can be seen were the trees were carbonised from the Tuff . Here a visiting geologist from the USA poses for a photo for me. the weight of the ash caused many of the trees to collapse and the shape of the bark can also be seen in the cliff face.
03.01.2022 Currumbin ridge was the sight of the another older valley to fill with flows of basalt from the Tweed Volcano while no cooling columns formed, some large boulders still remain.
03.01.2022 Another short video showing the rhyolite columns at Bally MT. The erosion of the southern side of the mountain has left a clear line where the volcanic flow cooled quickly
03.01.2022 There were many flows of Basalt from the Tweed Volcano and here Denham falls at Beechmont, flows over one of them.
01.01.2022 Just North of fingal is point Danger, where another flow of basalt along an older valley can be seen in the cliffs that make up the Qld NSW border.
01.01.2022 Purlingbrook falls flows over the lower and thicker flow of rhyolite at Springbrook at 100 Mts deep.
