Pedra Branca (Tasmania) - Geography

Geography

Pedra Branca is an erosional remnant of the Tasmanian mainland. It is approximately 270 metres (885 ft) long, 100 metres (330 ft) wide, and 60 metres (200 ft) high. This is small enough to provide an example of an outcrop that lies on the border between being a rock or islet and an island. The island is estimated to have separated from the mainland at least 15,000 years ago.

The geology features three breccia cones of dolerite and sandstone.

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