Ten Mile Brook: the Lost Valley

The Margaret River has only a few large named tributaries: the Mowen River, Bramley, Yalgardup, and Ten Mile Brook. The upper river valleys of the Margaret were formed after sediments filled the sunklands left by the breakup of Gondwana. They flow westward and onto the granite of the Leeuwin Block, a remnant of the super-continent left behind by India as it pulled away to the north. The Ten Mile Brook valley was lush and deeply forested, the result of ongoing weathering processes over millions of years. It supported one of the most… Read More