Visit the Moeraki Boulders

The Moeraki Boulders are massive spherical concretions formed over 60 million years ago through sedimentation and mineralization processes on the Otago coast.

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Moeraki Boulders

The Moeraki Boulders are unusually large and spherical boulders lying along a stretch of Koekohe Beach on the wave cut Otago coast of New Zealand between Moeraki and Hampden. They occur scattered either as isolated or clusters of boulders within a stretch of beach where they have been protected in a scientific reserve. The erosion by wave action of mudstone, comprising local bedrock and landslides, frequently exposes embedded isolated boulders.

This description uses material from the Wikipedia article on Moeraki Boulders and is licensed under the Creative Commons Attribution-ShareAlike License (view authors).