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All New Zealand Glenduan Boulder Bank
AO Edited

Boulder Bank

An unusual snaking bank of boulders caused by longshore drift.

Glenduan, New Zealand

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mharward
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Boulders.   mharward / Atlas Obscura User
North end of the Boulder Bank.   mharward / Atlas Obscura User
Haulashore Island, now separated from the Boulder Bank by The Cut.   mharward / Atlas Obscura User
View from Boulder Bank Drive.   mharward / Atlas Obscura User
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About

The Boulder Bank is an eight-mile (13 kilometers) stretch of boulders in the Nelson Harbour. The geological origins of this unusual natural formation are not well understood, but it was likely caused by longshore drift. Boulders were pulled off nearby headlands and formed the current structure over thousands of years. This unique formation is composed of granodiorite, the same type of rock from Mackay Bluff.

This structure creates a natural harbor, which was later cut to provide access for larger ships entering the region between 1903 to 1905. The section is now known as Haulashore Island.

Boulder Bank is now protected as a scenic reserve and is the nesting site for several bird species.

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Natural Wonders Nature Rocks Geology

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You can visit the Boulder Bank from either  Boulder Bank Drive or from Glenduan.

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mharward

Published

April 29, 2021

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  • https://en.wikipedia.org/wiki/Boulder_Bank
Boulder Bank
162 Boulder Bank Dr
Glenduan, 7071
New Zealand
-41.233333, 173.323222
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