The Moeraki Boulders, on Koekohe Beach, near Moeraki on New Zealand’s Otago coast. There are about fifty of them, some reaching three meters (almost 10 feet) in diameter, though there were many more a century ago. Souvenir hunters have taken their toll.
These boulders are concretions, first formed in seafloor sediments about 60 million years ago, then uplifted, and finally exposed by erosion of the sea cliffs until they fell out of the cliffs and rolled to their current location. Some remain half-embedded in the cliffs; they too will eventually roll out.
They have many other names, most of which are far more creative than the official one. My favorite has to be Hooligans’ Gallstones.
See below for a quick tale about how the boulders came to be (and to enjoy a Kiwi accent). Photo by Alexandra Sailer.
(Click the image to cholelithiasify.)