The Bombo Headland Quarry is of international scientific significance as it was formed when North and South Magnetic Poles were reversed. This period lasted from approximately the late Carboniferous to the late Permian, or for more than 50 million years, from around 312 to 262 million years ago. The name "Kiaman" derives from the Australian village of Kiama, where some of the first geological evidence of the superchron was found in 1925. (src: Sydney Water + Wiki) #photosphere 2 minutes ago - Via Reshared Post - View -