Macquarie Island, Australia
This island is located in the Southern Ocean and has a core protection area of 170 km2. It is located 1,500 km southeast of Tasmania, Australia, between the Pacific and Antarctica. Formed by the emergence of the Macquarie Ridge above the water, it is the result of the collision between the Indo-Australian Plate and the Pacific Plate and the subsequent uplift. As the only existing example of the zone of activity of mantle rocks (more than 6 km below the ocean floor) that is exposed above sea level, it has important geological preservation value. Among the features exposed at the surface are perfect pillow basalts and other forms of extrusive tuffs and lava.