Engineering geological investigations, Mana Island

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Bryant, J.M. 1972 Engineering geological investigations, Mana Island. Lower Hutt: New Zealand Geological Survey. New Zealand Geological Survey report EG 146 5 p.

Abstract: Mana Island has been chosen as a sheep quarantine station because of its geographical isolation. It is formed mostly of hard sedimentary rock (greywacke and argillite) overlain by gravels in places. Rainfall is low and water is scarce, necessitating the use of tanks; sewage disposal is also a problem. Sand for making concrete is not abundant and might have to be shipped out to the island. Other construction (buildings, roading and jetty) should present few problems. Permeable beds suitable for the disposal of wastes need further investigation. (auth)