The Bluff and Granite Island are some of Victor Harbor’s most prominent landmarks and both are made of extremely hard Granite. It was formed some 500 million years ago when molten rock (magma) was squeezed up from deep within the Earth.

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The Mainland is made from softer rock types (typically schist) which have succumbed to the erosive power of the ocean, the elements and glaciers. Some 280 million years ago, rain, waves, wind and ice have eaten away at the coastline to leave the granite exposed for all to see.