Pancake rocks

We travelled up the west coast today. After stopping off to take photos with our flip flops in Hokitika, we drove the scenic coastal road between Greymouth and Westport.
We stopped off on the way at a scenic reserve with these pancake rocks- you can kind of see them in the photo, e rocks basically look like stacks of pancakes. It isn't the description that would have sprung to mind for me, but I can sort of see it. There were holes in the rocks at the bottom so when the sea swells in it causes these surges and spectacular splashes.