Ball's Pyramid /

Ball's Pyramid is an erosional remnant of a shield volcano and caldera that formed about 7 million years ago. Balls Pyramid is 20 km (13 miles) southeast of Lord Howe Island in the Pacific Ocean. It is 562 m (1844 ft) high, while measuring only 1100 m (3600 ft) in length and 300 m (1000 ft) across, making it the tallest volcanic stack in the world. Balls Pyramid is located at 31°45′21″S 159°15′02″E / 31.75583°S 159.25056°E / -31.75583; 159.25056. It is part of the Lord Howe Island Marine Park. Balls Pyramid has a few satellite islets. Observatory Rock and Wheatsheaf Islet lie about 800 m WNW and 800 m WSW, respectively, of the western extremity of Balls Pyramid. Southeast Rock is a pinnacle located about 3.5 km southeast of Balls Pyramid. Like Lord Howe Island and the Lord Howe seamount chain, Balls Pyramid is based on the Lord Howe Rise, part of the submerged continent of Zealandia. The pyramid was named after Lieutenant Henry Lidgbird Ball who discovered it in 1788 at the same time he discovered Lord Howe Island (see the history section of that article). The first person to go ashore is believed to have been Henry Wilkinson in 1882, who was a geologist at the New South Wales