| 1. | Basement rocks are buried under the thick weathered layer and rarely exposed.
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| 2. | The basement rocks are mainly gneisses, mica schists and Upper Cretaceous ).
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| 3. | Basement rocks are andesitic volcanics are found less than 1 km away.
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| 4. | Continental metamorphic and granitic basement rocks have been dredged from both knolls.
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| 5. | But there are many possible variations of basement rock and soil type.
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| 6. | The plateau consists of thick sandstone formations which overlie granitic basement rock.
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| 7. | The plutonic basement rocks are subdivided into the Nelson, Fiordland and Stewart Island.
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| 8. | The intrusion event half rose Itarar?Subgroup sandstones and crystalline basement rocks also.
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| 9. | The basement rock formed half-grabens where eroded sediments from the break-up were then deposited.
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| 10. | The higher competence of the Caledonian basement rocks made them more resistant to erosion.
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