Story: Coastal erosion

Drowned valleys (1st of 2)

Drowned valleys

As the sea has risen over the last 10,000 years it has flooded former river valleys. The Marlborough Sounds, at the northern tip of the South Island, are drowned river valleys. The land here is slowly sinking into the sea, so few beaches have formed. The waters are sheltered, with small waves eroding the coast at a much lower rate than at the outer shores, which face the exposed waters of Cook Strait.

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GNS Science
Reference: CN15225/26
Photograph by Lloyd Homer

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How to cite this page:

Willem de Lange, 'Coastal erosion - Rocky coasts', Te Ara - the Encyclopedia of New Zealand, (accessed 18 July 2024)

Story by Willem de Lange, published 12 Jun 2006