Wednesday, 10 September 2014
Ball's Pyramid is an erosional remnant of a shield volcano and caldera that formed about 7 million years ago. It lies 20 kilometres southeast of Lord Howe Island in the Pacific Ocean. It is 562 metres high, while measuring only 1,100 metres in length and 300 metres across, making it the tallest volcanic stack in the world. Ball Pyramid is part of the Lord Howe Island Marine Park in Australia. Source
