Student 6: High Not Achieved
Rock type 1. Greywacke.
Greywacke is the name given to a type of sedimentary rock that is found all over NZ. It is grey in
colour and is made of rock particles. In our local area of Mt Cook there are many different layers
of greywacke rock which have lots of big folds in them. These folds were caused by plate
tectonics.
Erosion and landforms
Around Kaikoura there are lots of caves. These caves are found in limestone and have been
made by the action of the sea crashing against the rocks. Some caves are quite high up
suggesting that the coastline was once higher than it is today.