Though I’ve often visited (and photographed) the area around Castle Rock, I have very few images focused on the large rock itself. On Sunday, I noted nice clouds forming during the afternoon and decided to brave the heat and humidity for a photoshoot. The outing took me to Devereux Beach and then to various points around the neck. I ended at Castle Rock and started there with some compositions of the beach. I then turned and focused on this rock face and included the great clouds above and sailboats in the distance.
On returning home, I decided to try to learn more about the geology of Castle Rock. Some searching led me to learn that the rocks are all that is left of volcanoes that had been active during the late Precambrian era. Dating performed in the early 1990’s puts Castle Rock at 596 million years old. A ‘complex assembly of felsic volcanic rocks’ forms the large rock jutting out into the ocean and these are apparently made up predominately of rhyolite (the volcanic equivalent of granite).
