Kaikōura orogeny

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The Kaikōura Orogeny is a

Then from 15 million to 5 million years ago the Pacific Plate was rammed up over the Australian Plate along the newly created Alpine Fault. The pressure applied from 25 to 15 million years ago had simply been too much and the crust thickened. This gave birth to the first of the Southern Alps. Also during this period of time, chlorite-grade schist was brought to the surface.

From 5 million years ago to the present day the rate of uplift has accelerated. Oligoclase and biotite schist have also been pushed to the surface of the Earth.

In total about 20 kilometres of uplift has taken place during the Kaikoura Orogeny but most of this has been eroded away.

References

• The Rise and Fall of the Southern Alps, G. Coates published 2002

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