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Granite rock formations - Murphys Haystacks, Mortana - South Australia
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Granite rock formations - Murphys Haystacks, Mortana - South Australia
Eyre Peninsulas Murphys Haystacks are among the oldest rocks in Australia but they re slowly eroding away.
They are of a tumulus form of weathered granite outcrop. They are made of a pink, massive, coarsely equigranular rock consisting mostly of quartz and orthoclase. Their appearance may be due to a combination of erosion by underground rainwater and then by subsequent weathering after they were exposed. Most of the pillars emerge without a break from the underlying granite. Their structural base may be of orthogonal or vertically-aligned sheet jointing.
The rocks shapes are believed to be 1.6 billion years old, as the rock itself was believed to be 3 billion years old.
" The actual granite itself is very ancient, but the form of the Haystacks is much more recent, so you can probably go back to the time of the dinosaurs and the weathering of the landscapes."
Unveiling the Splendour of Australia through Exquisite Artwork
Robbie Goodall
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Media ID 21145351
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This stunning print captures the ancient beauty of Granite rock formations known as Murphys Haystacks in Mortana, South Australia. These unique tumulus-shaped outcrops are among the oldest rocks in Australia, dating back 1.6 billion years. Made of a pink, equigranular rock consisting mainly of quartz and orthoclase, these majestic pillars are slowly eroding away due to underground rainwater and subsequent weathering.
The structural base of these rocks may have orthogonal or vertically-aligned sheet jointing, giving them their distinctive shapes that seem to emerge seamlessly from the underlying granite. Despite their age, the form of the Haystacks is relatively recent compared to the actual granite itself which is believed to be 3 billion years old.
As you gaze upon this photograph, you can almost feel transported back in time to when dinosaurs roamed the Earth and landscapes were being shaped by natural forces over millions of years. The resilience and enduring beauty of Murphys Haystacks serve as a reminder of our planet's rich geological history and the constant cycle of erosion and renewal that shapes our world. Truly a breathtaking sight to behold!
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