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Other Moon Rock (Augrabies Falls NP)

ID: w316504 View large map

Located in South Africa :: Northern Cape (Great Karoo)  :: Augrabies
Category: Attraction :: Other

A massive exfoliation dome or “whaleback” which is a prominent landmark of Augrabies Falls.

Moon Rock is a huge exfoliation dome made of Augrabies Gneiss. Exfoliation domes are formed when the uniform composition of granite (before it turns into gneiss) is extremely resistant to weathering because water,needed for chemical weathering, cannot penetrate the granite easily. Moon Rock consists of two oblong, east-west aligned domes connected in the middle.

The northern dome is larger and is approximately 700m long and 100m high. The current weathering process on Moon Rock is known as onionskin weathering: layers of rock, from as thin as a few centimeters to as thick as a meters, wear away. This happens in all rocks that are mineralogically and texturally uniform.(Source: SanParks)

Address :  Augrabies, Northern Cape (Great Karoo), South Africa

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