This 700,000-year-old sand island helped the Great Barrier Reef form

Scientists had always been puzzled why the Great Barrier Reef formed long after Australia had conditions suitable for reef growth. Image: Unsplash/Manny Moreno

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If not for the presence of K’gari, the sand carried by this system would continue to migrate northward directly into the area of the Great Barrier Reef, which starts a little north of the island.
If not for the presence of K’gari, the sand carried by this system would continue to migrate northward directly into the area of the Great Barrier Reef, which starts a little north of the island. Image: Conversation

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