Part 4 of a series of photographs taken at Fourchu Head on Cape Breton Island in Nova Scotia, Canada, showing details of rocky outcrops and boulders composed of very ancient Neoproterozoic volcanic rock. They are all made from volcanic ash that was spewed from the volcanoes together with shattered pieces of rock that broke away from the bedrock with the explosive force of the explosion.

6 Replies to “Fourchu Head Rocks Part 4”

  1. Thank you, Evelyn. I love to see seaweeds en masse like this creating their own compositions and unusual textural mats. Some of the species are new to me too, such as the one with lacey holes.

    PS The seaweed riddled with holes is called Sea Colander (Agarum cribosum)


  2. I know what you mean – but it might be a bit hot and hazardous as an eye witness to the geological events that created these rocks: think of the pyroclastic flows from Vesuvius that engulfed Pompeii in ancient Italy, and the ashy eruptions from Mount St Helens more recently and closer to home! However, I do try to learn about and visualise what happened to the rocks from each place I visit in an attempt to understand how they have acquired their dinctinctive appearance.


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