Bearded Geology

While doing some research for a new blog post, I took a break from writing by taking a trip over to Facebook again , and unfortunately found something else to write about: I've seen this image before and apparently it's making the rounds again. Based on what you see here, with no additional text or context given, is there any way that you can arrive to the same conclusion as the one given? I find that there is an absurd amount of information that is neglected, which prevents me from making any conclusions whatsoever. But firstly, what is this an image of? Photograph of Fort Denison, circa 1880s. (credit: Wikimedia /National Archives of Australia) This is Fort Denison on delightfully named Pinchgut Island in the Sydney Harbour of Australia. Originally built as a prison, and later converted into a fort to protect the harbor, Fort Denison still stands today well within eyesight of the famous Sydney Opera House and Sydney Harbour Bridge. I was not able to find the