Tag: moeraki boulders

Moeraki Boulders, Moeraki, New Zealand

Plopped on the sands of Koekohe Beach, the Moeraki Boulders are an unlikely sight. They are concretions caused by the cementation of Paleocene mudstone—the equivalent of a 4-million-year-old stony pearl. Of the various nicknames for them, “hooligans’ gallstones” takes the cake.