Moeraki Boulders Otago NZ, The Moeraki Boulders are situated on Koekohe Beach at a place named Kumara, midway between Hampden and Moeraki townships in North Otago. Access to them is gained by a small one-way side road, 1 mile north along the main road from Hillgrove railway station. The boulders are grey-coloured septarian concretions, which have been eroded out by wave action from the cliffs of soft, black mudstone that back the beach. In places, partially exposed concretions can be seen in the cliffs. They originally formed on the sea floor when the mudstone was accumulating

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