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Murphy’s Haystacks are a group of ancient, wind-worn rock of pink granite located between Streaky Bay and Port Kenny on the Eyre Peninsula in South Australia. Set in the middle of a wheat field and surrounded by mallee scrub, they are one of the most popular and photographed attractions on the Eyre Peninsula.

Murphy’s Haystacks are what geologists call inselberg, which are isolated rocky hills or ridges that rise abruptly from a gently sloping or virtually level surrounding plain. An inselberg forms when a body of hard rock surrounded by a layer of soft rock becomes exposed to erosion. The less resistant outer layer is eroded away to form a plain, leaving the more resistant rock behind as an isolated mountain.

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© Amusing Planet, 2015.


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