Canal Rocks

Canal Rocks is a series of granite rocks in the Indian Ocean, just off the coast situated approximately 4 kilometres south of Yallingup in the South West region of Western Australia. The Noongar name for this place is Winjee Sam.

The rock formation takes its name from the narrow channel between the rocks that has formed from the coastal waters eroding the granite-gneiss away over time. The rocks that make up the canals are part of the Leeuwin-Naturaliste Ridge, or Leeuwin complex. The rocks that make up the feature consist of hornblende-biotite monzogranite gneiss that are medium to coarse-grained and moderately foliated containing minerals such as perthite, quartz, hornblende with accessory biotite, opaques, apatite, and zircon. The original rock that underwent medium metamorphism was granite. The estimated age of crystallisation is 702 ± 7 million years.

Source: Wikipedia