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This is the question that has been going on in minds of people ever since the news of discovery of a 'river under sea' starting making rounds all.
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Divers can switch on their lights and find their way through the relatively short distance before emerging into the salt water.

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Those who weren't aware that the pictures were taken underwater could easily believe they were looking at a secluded spot in the middle of a forest. The trees and branches lie on top of the collapsed rubble which fills nearly half of the pit, leaving a narrow passage down the side.

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Cenote Angelita was formed by a rock collapse which created the ft pit containing fresh water and salt water, as well as the river effect of the hydrogen sulfide. The cave can be found a short drive from the Maya city Tulum on the east coast of Mexico's Yucatan peninsula. The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.

Wednesday, Sep 19th 5-Day Forecast. Haunting images of scuba diver exploring mysterious channel flowing in water-filled cavern The Cenote Angelita, which translates as 'little angel', reveals what looks like a river winding through a forest to divers The swirling mist of the 'river' is actually a cloud of the gas hydrogen sulfide created by the mix of fresh and salt water Divers can swim through the cloud, which appears 90ft down, to find another 90ft descent below By Helen Lawson for the Daily Mail Published: Share this article Share.

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Man shoots himself in the stomach to test a bulletproof Is this the legendary Gray Man ghost of Pawleys Island? Calamity and carnage as The Black Sea undersea river is a current of particularly saline water flowing through the Bosphorus Strait and along the seabed of the Black Sea.

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  • The discovery of the river, announced on 1 August , was made by scientists at the University of Leeds , and is the first of its kind in the world. Scientists have previously discovered channels running along ocean floors, based on sonar scanning. One of the largest of these runs from the mouth of the Amazon River into the Atlantic Ocean.

    Black Sea undersea river - Wikipedia

    Because of the power and unpredictability of these streams, they have been difficult to explore directly. The team used the Natural Environment Research Council 's Autosub3 — a 7-metre torpedo-shaped autonomous underwater vehicle — to get as close to the current as possible. Part of the reason for this is the difficulty in studying an environment at that depth.

    Many of the channels are found more than a mile 2km down and can flow to depths of 2. To reach these inky depths requires specialised remote controlled deep-sea submarines. Worse, the rivers only flow some of the time. After a flow has passed, the channel may be inactive for weeks, months or even years. We know remarkably little about these underwater rivers. Instead, for many years researchers had to rely on laboratory simulations, mixing seawater with building plaster or mud in large tanks to create turbidity currents. Footage of these experiments reveals that the currents are similar to avalanches or pyroclastic flows, as the sediment billows and surges along the bottom of the tanks.

    Now a small band of intrepid researchers are beginning to explore these deep-sea channels and learn more about how they work and what lives around them.

    Black Sea undersea river

    In a study published in , Peakall and Parsons sent a robotic submarine down to a deep undersea channel that runs across the bottom of the Black Sea. His team is using autonomous underwater vehicles to show how the flows are changing the seafloor. Parsons is also conducting similar research off the coast of British Columbia. Here, they found another type of current is carving the river channel, this time a flow of salty water, which originally comes from the Mediterranean, spills into the Black Sea through the narrow Bosphorus strait and then into the channel.

    View image of Placing benthic event detector Credit: Since the Mediterranean water is saltier, and so denser, than the Black Sea, it remains separate, flowing at a speed of around 4mph 6. Every second, around 22, cubic metres of water passes through the channel. Only in the last few years have researchers witnessed an undersea mud river in the real world. In , Charlie Paull of the Monterey Bay Aquarium Research Institute and his colleagues were using an ROV to explore a relatively small underwater canyon, just a few miles from the Californian coast. The ROV was tethered to a ship on the surface, around 1,ft m above.

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    Without warning, a turbidity current came roaring down the canyon and the ROV was caught in it. The five-ton ROV was lifted off the seafloor and pushed sideways. It beamed back video , which revealed a dense layer of muddy water surging and billowing across the canyon valley. Clumps of kelp, torn from the seabed further upstream, could be seen rushing past.

    But before they could learn more, the team had to pull the ROV out of the flow, for fear it would be torn free of its tether. A analysis by Esther Sumner of the University of Southampton showed that the sediment flow, which was ft 90m thick from top to bottom, had travelled down the canyon at around 3. Oceanographers at the Monterey Bay Aquarium Research Institute are now leading the development of new technologies to study bigger rivers. These can sit on the floor of the channel.

    Incredible River Under The Sea - Sungai Bawah Laut

    When a sediment river cascades down, they are picked up and carried along. They send back information about how they roll, glide and lift from the sea floor. View image of Deploying detector into sea Credit: Yet the sheer power of these enormous flows of sediment can make studying them a challenge.