Macquarie Island: The Only Place Where You Can See Earth’s Mantle Actively Exposed Above Sea Level

Macquarie Island: The Only Place Where You Can See Earth’s Mantle Actively Exposed Above Sea Level

Far out in the Southern Ocean, between Tasmania and Antarctica, lies a sliver of land unlike any other on Earth—Macquarie Island, where the unimaginable becomes real. Here, you can literally walk on rocks that were once buried 6 kilometers beneath the ocean floor, now exposed above sea level due to a rare and ongoing geological phenomenon. Measuring just 34 kilometers (21 miles) long and 5 kilometers (3 miles) wide, Macquarie Island is more than…