Sandy Island

Sandy Island is gone. This is the biggest thing that happened in the field of marine research in 2012, and it is also the most bizarre thing. At that time, scientists from the University of Sydney in Australia were carrying out marine research on the “Southern Prospector”. When the ship sailed between Australia and French New Caledonia, they found a 20-kilometer-long ship marked on the map. The island disappeared. Scientists were horrified, speculating and starting to study its whereabouts.

Sandy Island appears on the map and was drawn by James Cook, a famous British navigator and excellent cartographer, in 1774. He led the crew to the Pacific three times and found many islands and mapped them on the map. One of them is Sandy Island.

Because this is an isolated island and there has been no record of human activities, some people speculate that this is an island that Cook deliberately fabricated to protect copyright. Many cartographers have done this for fictitious maps. In theory, everything marked on the map exists objectively, no matter who draws it, it makes no difference, so it is easy to pirate. So, the cartographer will deliberately

unsolved puzzle

Make a mistake in one or two places, make up an inconspicuous village or increase or decrease the width of the driveway as an anti-counterfeiting mark.

However, scientists have ruled out the possibility of creating an island in the ocean. Because ships on the ocean rely on maps for navigation, if they encounter danger, they will take refuge on the nearby islands according to the map. Once they find that the island is not there, it will delay the time for help and endanger lives, so morally speaking, Cartographers would not do this. So, the question is, where did this island go?

Did the island sink? After all, there are many sunken islands. In 2013, a small island with a height of 20 meters, a length of 90 meters and a width of 40 meters suddenly appeared near the coast of Pakistan. It was formed by the eruption of a mud volcano triggered by an earthquake, but with the erosion of the sea, it basically sank by 2016 Up. However, only the part above the sea surface has disappeared from this small island, and the part below the sea surface is still there. If Sandy Island falls into a similar situation, there may also be leftover parts. With this expectation, the scientists at the University of Sydney went to explore again, but until they observed a depth of more than 1,400 meters underwater, they did not find any traces. As a result, scientists basically ruled out the possibility of Sandy Island sinking.

Could it be that Sandy Island hid itself or flew away? Although this is impossible, no one knows the answer. It was not until 7 years later that there was another guess. In August 2019, when the Queensland University of Technology in Australia visited the South Pacific, it was discovered that there were large black stones of various sizes floating on the sea, as big as a basketball and as small as marbles, with a total area of ​​about 150 square kilometers. Scientists were very surprised that the stones surfaced, so they picked up the pumice for research. It turns out that these pumice stones came from a submarine volcano that spewed out near the Kingdom of Tonga not long ago. After the volcano’s lava came into contact with the cold sea water, it quickly cooled, causing a large number of bubbles to enter the lava. The holes that formed the bubbles were small on the surface The tension will prevent the seawater from entering, so the buoyancy of the stones increases, and they emerge from the sea together and drift along with the ocean currents. However, when the air in the stone is washed out by the water, the proportion of the pumice increases and it sinks to the bottom of the sea.

Submarine volcanic eruptions are relatively common in the South Pacific, and occur about once every 5 years. Therefore, the small “island” that Cook sees is likely to be floating rocks. It looks like an island from a distance, because it did not go there. The textual research was drawn on the map. After that, with the passage of time, this small “island” slowly disappeared.

Sandy Island has been on the map for nearly 250 years. What happened in the South Pacific during this period, and did it really exist? At present, scientists do not have conclusive evidence, but this phenomenon is related to the survival of mankind and is worthy of research.