Corroboree in the light

Corroboree Rock is a large formation made out of dolomite that is located approximately an hour's drive east of Alice Springs, Australia. It is part of the East MacDonnell Ranges. It is of great importance to the local aborigine people.

"Just off the Ross Highway, some kilometres northeast of the Emily and Jessie Gaps, is a weathered, rippled rock called Corroboree. It began to be formed some 800 million years ago when a shallow, salty sea laid down a fine silt. Algae grew over this silt and shaped itself into mounds that solidified into rock over millions of years.

The movement of the earth caused the folding of strata (layers) of rock into the vertical plane, causing the original horizontal layers to stick straight up out of the earth in the form of a ridge. Wind, rain and sun gradually wore down the ridge, with only Corroboree, a particularly hard section of rock, remaining today.

The three predominant colours in the rock are black, orange, and white. The black colour comes from the oxidation of iron particles within the stone, and the orange and yellow are the result of tropical weather conditions."

www.expedition360.com/australia_lessons_geography/2001/09...

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