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It was the beginning of the area that is now known as New Zealand and was just off the coast of Gondwana.Some volcanic islands built up after they became extinct, were covered with sands and mud, washed down from the land.We hope it will be of occasional use to radiocarbon users and interested students alike.
Between 23 and 10 million years ago the western side of the Alpine Fault was moving northeast relative to the eastern side at a rate of between 1-10 cm per year.
Some seafloor was caught in the folding and later exposed when the orogeny had finished and erosional forces had levelled the mountains.
These seafloor rocks can be seen today at Dun Mountain, West Dome and Red Hills in the Nelson region of the South Island.
Reference Websites Find out more about New Zealand's volcanoes on: Books Nelson C.
Geological Time | Geologic Time Scale | Plate Tectonics | Radiometric Dating | Deep Time | Geological History of New Zealand | Radiometric Dating Radiometric measurements of time Since the early twentieth century scientists have found ways to accurately measure geological time.