Wave Rock at Hyden, Australia

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Wave Rock is an interesting natural rock formation located east of the small town of Hyden in Western Australia. It derives its name from the fact that it is shaped like a tall breaking ocean wave. The Wave Rock is composed of granite and the total outcrop covers several hectares. The rock is about 15 meters high and approximately 110 meters long.

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It should be noted the shape of the rock is not caused by a wave phenomenon, rather its rounded wave-like shape was formed by subsurface chemical weathering followed by removal of the soft weathered granite by fluvial erosion, thus the weathering occurred below ground level before it was exposed. The end result is an undercut base, leaving a round overhang

One aspect of Wave Rock rarely shown on photographs is the retaining wall about halfway up the rock. This follows the contours and allows rainwater to be collected in a storage dam. It was constructed in 1951 by the Public Works Department, and such walls are common on many similar rocks in the Wheatbelt region of Western Australia. wave-rock4

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