Ball's Pyramid is an uninhabited islet in the Pacific Ocean located 20 kilometres southeast of Lord Howe Island. The steep rocky basalt outcrop is the eroded plug of a shield volcano and caldera that formed 6.4 million years ago. It is 572 metres high, while measuring 1,100 metres in length and only 300 metres across, making it the tallest volcanic stack in th…Ball's Pyramid is an uninhabited islet in the Pacific Ocean located 20 kilometres southeast of Lord Howe Island. The steep rocky basalt outcrop is the eroded plug of a shield volcano and caldera that formed 6.4 million years ago. It is 572 metres high, while measuring 1,100 metres in length and only 300 metres across, making it the tallest volcanic stack in the world.
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