This morning Dave and I took a side trip to the famous geological site, The 12 Apostles, located on the Great Ocean Road just outside Port Campbell. The formations in the ocean are of sandstone and limestone and have been created by the ocean waves against the cliffs. These were thought at one time to be caves. The surrounding ocean area is said to be a kelp forest with much vibrant marine life. But since oceans are warming and acidifying I wonder how this area is affected.