Ball’s Pyramid, Australia – is an erosional remnant of a shield volcano and caldera that formed about 7 million years ago. Ball’s Pyramid is 20 kilometres southeast…

Ball’s Pyramid, Australia - is an erosional remnant of a shield volcano and caldera that formed about 7 million years ago. Ball’s Pyramid is 20 kilometres southeast...

Ball’s Pyramid, Australia – is an erosional remnant of a shield volcano and caldera that formed about 7 million years ago. Ball’s Pyramid is 20 kilometres southeast…
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