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Rainbow Valley Images

Wurre / Rainbow Valley Conservation Reserve

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Rainbow Valley Conservation Reserve / Wurre
The red sandstone is the toughest rock in the face of Rainbow Valley, as it has a relatively high content of iron and silica. However, at the base lie fallen blocks of dark-brown sandstone which have the most iron of all. These blocks were part of the very top of the capping, and as such represented the land surface of 20 million years ago.

The yellow and orange sandstones have less iron and silica than the overlying red capping. They are softer and have been washed away to form the sand dunes below.

The white bleached zone was formed by the leaching out of iron and silica, which were deposited in the overlying capping. When erosion attacks this relatively soft and fragile rock, the capping is undermined and will eventually collapse, often falling off in large blocks.

Source: NT Parks and Wildlife signage

Rainbow Valley Images

Rainbow Valley - this photo is taken looking across the dried claypan.
Rainbow Valley © AusEmade PL, July 2007
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