5 April 2010. About halfway between Mt Ebenezer and Uluru we came over a hill and saw Mt Connor in the distance. Many people, in their excitement, mistake it for Uluru but this mountain, also a monolith, is three times its size!
Uluru is a single rock, or monolith, 348 metres high and 9.4 kms in circumference. Only one third of the rock appears above ground. It was formed maybe 900 million years ago when sediment settled in a huge crevice on the bottom of the sea. It is made of sandstone with a high content of feldspar which is much harder than granite. When the sea receded, the surrounding land masses eroded away leaving The Rock exposed on a flat plain.
Although it looks smooth from a distance the surface has a flaky appearance. Its true colour is grey, as you see in the caves, but the outside surface is weathered by water and oxygen that turns the iron content a rusty colour.
I was surprised to see the gaping holes in its surface. In the picture above you can see a large boulder next to the road which has fallen from one of the holes.
In the evening we took photos of Uluru at sunset - the pic below, with the evening shadows, shows the rich red colour as the setting sun catches the rock and the next pic shows the colour in daylight.
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