Underwater volcano creates floating ‘rock raft’ bigger than Paris – and it’s just crashed into Australia
A VOLCANIC stone raft has finally crashed into Australia’s coast after an underwater volcano created it last year.
The pumice stone raft was bigger than Paris when floating in the ocean and it’s ferried lots of marine organisms to Queensland beaches.
The stone raft was larger than Paris[/caption]
The floating mass of pumice rocks was discovered by sailors as they made their way to Fiji and filmed it taking over the ocean.
It’s thought to be the result of a deep-sea underwater volcanic eruption near Tonga in the South Pacific Ocean.
Pumice is formed by lava coming into contact with water.
As the lava cools it forms stone with lots of gas bubbles inside and that’s why pumice rocks float.
Footage of the pumice raft shows it was visible as far as the eyes could see[/caption]
The pumice has finally reached the shore[/caption]
Large gatherings of pumice rocks like this are referred to as pumice rafts as the rocks come together to form one big moving mass.
Satellites could observe the mass of stones from space as it drifted towards Australia.
Pumice rafts can have a really positive impact on the environment[/caption]
On its way it has picked up lots of marine organisms that cling to the rocks and could find a new home in Australian coral reefs.
These organisms include corals, algae and barnacles.
The pumice made the ocean look like land[/caption]
Geologist Scott Bryan from the Queensland University of Technology said: “Each piece of pumice has its own little community that has been transported across the world’s oceans – and we have had trillions of pieces of this pumice floating out there following the eruption.
“Each piece of pumice is a home, and a vehicle for an organism, and it’s just tremendous.
“The sheer numbers of individuals and this diversity of species is being transported thousands of kilometres in only a matter of months is really quite phenomenal.”
Pumice rafts aren’t always good news though.
They can be dangerous for sailors and can cause boat damage.
They can also smother coastlines.
Australian couple Michael Hoult and Larissa Brill sailed into the pumice raft by accident on their way to Fiji[/caption]
Scientists are hopeful that this particular pumice raft will boost reef ecosystems but know it’s not a magical solution for stopping their decline.
Bryan said: “Pumice rafts alone won’t help mitigate directly the effects of climate change on the Great Barrier Reef.
“This is about a boost of new recruits, of new corals and other reef-building organisms, that happens every five years or so.
“It’s almost like a vitamin shot for the Great Barrier Reef.”
How do volcanoes erupt?
Here’s the basic facts…
- Volcanoes are formed when a hot liquid like substance called magma breaks through the Earth’s crust
- Once the magma reaches the surface and gushes into the air, this is known as a volcanic eruption
- Volcanic eruptions can release lava, rocks, dust, volcanic ash and toxic gases into the atmosphere
- Some eruptions are huge and kill lots of people but other eruptions can be small flows of lava that are easily avoided
- Volcanoes normally give off warning sides before an eruption occurs, such as tremors or gases, and this gives people nearby time to evacuate
- Underwater volcanoes create pumice when the lava comes into contact with water
- This is because when hot magma touches water it is rapidly cooled and de-pressurised, creating a floating stone substance full of gas bubbles
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