The development of caves and bays was amply demonstrated along the way. We manoeuvred close to the cliffs at one stage to see, as the swell dropped, a tiny triangle of black darkness. This was a weakness in the rock currently being exploited by ocean action and gradually enlarging. As the sea entered and left the hole with power , tall columns of spray flew heavenward. A blowhole. Of course we loved the drama when bursts of millions of droplets veiled our space. 
Watch Jeanette’s video for some of the action.
Equally dramatic were the changes in the sky. The wildness above fitted well with the ruggedness of the land.
While most of the cliffs offer variations on vertical pillars of grey dolerite, there is one part of the coastline at Haulage Bay comprised of horizontal yellow sandstone.
In the 19th century Bruny Island sandstone provided the raw material for buildings such as the Melbourne Post Office.
Further south we circled a cluster of two types of Cormorants or Shags – the Black Faced Cormorant and the Great Cormorant – as they rested on their rocky islet.
Tasmanian Discoveries 