The coast of Otago on the South Island of New Zealand is known for a strange and still unexplained nature phenomenon.

Huge stone balls coming from the sea wash on beaches… The so-called Moeraki Boulders.

Moeraki boulders, Moeraki boulders unexplained, mysterious Moeraki boulders, unexplained Moeraki boulders phenomenon, unexplained Moeraki boulders, Moeraki boulders new zealand, The gigantic boulders started forming on the ocean floor and can now been seen sitting mysteriously on the coastline thanks to centuries of erosion.
Photo by Steffen and Alexandra Sailer

These stone balls are found either singly or in groups and can reach a size of up to 2.5 meters in diameter.

The exact formation process of the Moeraki boulders is not fully understood.

These stone balls contain mud, clay and fine clay, which are held together by calcite. Moreover, new specimen are always discovered.

These strange calcite balls resulted in a multitude of legends and myths.

For example, the Maori believe that the moeraki balls represent the remains of eel baskets, sweet patatoes, and bottle gourds, coming from the wreck of the legendary giant canoe Arai-te-uru.

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