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