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Posted on June 7, 2024 (Updated on July 12, 2025)

Has anyone driven under, or received camera footage from, the Great Artesian Basin in Australia?

Water Bodies

Journey to the Earth’s Hidden Heart: Ever Wonder What Lies Beneath the Great Artesian Basin?

Australia’s Great Artesian Basin. Just the name conjures images of a vast, hidden world. Spanning a whopping 22% of the continent, it’s like a gigantic, invisible swimming pool tucked beneath Queensland, New South Wales, South Australia, and the Northern Territory. We’re talking about an estimated 64,900 million megalitres of water – that’s a LOT of H2O! It’s the lifeblood of the outback, crucial for communities and ecosystems alike. But it begs the question: has anyone actually seen what it’s like down there? I mean, has anyone ever taken a submarine, or even just a really good camera, for a dip in this subterranean sea?

Well, hold your horses. Before you imagine Jacques Cousteau exploring underwater caverns, let’s get one thing straight. The GAB isn’t some kind of underground ocean with mermaids and sunken treasure. Think of it more like a giant, natural sponge. The water’s trapped within layers of porous sandstone, sandwiched between rock and clay that water can’t penetrate. This creates incredible pressure, which is why water bubbles up naturally through wells and springs – nature’s own taps! And these aren’t shallow puddles; some of these bores plunge down as far as 2,000 meters! That’s deeper than some of the world’s tallest buildings.

So, how do we even begin to understand what’s going on so far beneath our feet? The answer, unsurprisingly, is drilling. Think of it like a super-sized version of sticking a straw into a milkshake. These boreholes give us a peek into the geological makeup of the aquifer. We can pull up core samples – basically, chunks of rock – and analyze them to figure out what they’re made of. Plus, we use clever gadgets called geophysical instruments that we lower into the holes to measure things like how porous the rock is and how dense it is. I remember reading about a mineral exploration hole in Kalgoorlie, Western Australia, that went down a staggering 3,011.5 meters. Talk about deep!

Okay, so no one’s gone for a swim. But what about robots? We’re living in the future, after all! While we haven’t sent any droids specifically into the GAB, robotic technology is making huge strides in exploring other tough-to-reach underground spots. Imagine little legged robots, or even tiny drones, mapping out cave systems and old mines all on their own. They’re even figuring out how to navigate these places without Wi-Fi! It’s pretty mind-blowing.

And let’s not forget about the deep sea. We’ve got ROVs – remotely operated vehicles – that are exploring the darkest depths of the ocean, sending back incredible images and collecting samples. Who knows, maybe one day we’ll have ROVs exploring the GAB!

Of course, there’s another way the GAB reveals itself: springs. Especially along its southwestern edges, you find these amazing artesian springs, including the iconic mound springs. These are like natural overflow valves for the basin. They’re not just pretty to look at; they’re vital ecosystems and hold deep cultural significance for Aboriginal Australians. Studying these springs is like reading the GAB’s diary – it gives us clues about the water’s quality and how the whole system works.

So, the bottom line? No, no one’s cruised around under the Great Artesian Basin in a submarine, snapping photos. But we’re not exactly in the dark about what’s going on down there. Through drilling, clever technology, and studying those precious springs, we’re slowly piecing together the puzzle of this incredible underground world. And who knows what the future holds? Maybe one day, we will get to see the GAB through the eyes of a robot explorer. Now that’s a thought!

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