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#supervolcano #australian #australia #volcano #volcanic #volcaniceruptions #volcanoeruption #geoscience #earthscience #caldera #cerberean #caldera #victoria #devonianera #granite #ancient #volcanoes #geological #geology #earthsciences #geoscience #geosciences #plinian #faultline #faults #tectonic #tectonicplates #buchan #buchanrift #riftvalley #tectonicrifting #riftvolcano #volcanism

The state of Victoria, in the South Eastern most region of continental Australia, was home to a massive number of ultra-plinian volcanoes and supervolcanoes during the Devonian era. The state is divided in two, with the largest volcanic activity occurring during the early devonian at a site in Victoria where there was a rifting that was taking place. This rifting allowed magma from deep within the earth to rise up, and in doing so, this extremely hot basaltic magma melted the extremely volcanic bedrock basement of Victoria, turning the chemistry of the magma from a low silica mafic one, to an extremely viscous high silica blend, which led to the formation of over 2 dozen massive volcanic calderas in this region. We will cover this in part 2. In our last episode we covered the volcanic activity that occurred in the Late Devonian, which was related to a nearby orogeny that was induced by a tectonic collision and subduction that was happening near to here, as more and more of Victoria was continuing to be risen from the deep sea, creating a land more recognizable to that one that exists today, with it being built one step at a time, bit by bit like a puzzle. This event created volcanoes in Mount Macedon, Mount Dandenong, Marysville, and more.

In this episode, we go to the Buchan rift, a notorious place in Victoria where some of the largest and most explosive volcanoes occurred. These eruptions were tremendous in scale and produced calderas of varying sizes, from small to extremely large. And along with that, we have magma travelling vast distances from the rift itself, and ushering in even more violent eruptions in places near and far from the rift. In this video we try to break down each large and noteworthy caldera that exists in the Buchan rift, using magnetics, fault maps, and other tools to help us in our search. We find quite a bit, and in the process, we highlight just how confusing this area is with how many dozens of ignimbrite layers that exist all over the place. Making finding the eruption point almost impossible... until magnetics began to be used! Now we can peer beneath the surface and exam what the structure beneath the ground looks like and my goodness does it speak volumes.

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Link to Part 1 of this 2 Part Series:


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OzGeology is an Australian-based YouTube channel that specializes in creating high-quality documentaries on Earth sciences and natural disasters. The content is designed to be easy to digest and covers a wide range of topics, not only focusing on geology but occasionally exploring other scientific areas as well.

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