Qwerty

Geology internal
Surface feature: Kiwi point quarry rock face
Johnsonville
Shops
Reference:
http://maps.google.co.nz/
Ngauranga gorge

Kiwi point quarry

Reference: http://maps.google.co.nz/
Exposed quarry rock face from the road in Ngauranga gorge (picture 1).
Take note that most of the other photos after this are taken of the rocks behind the trees and below it.

Outline of kiwi point quarry

Roughly
4m
The picture to the left is a picture of the bottom of the rock face in the quarry and as you can see the rocks are quite grey in color. They have lots of cracks and jagged edges due to rocks breaking away caused by human mining and weathering. The rock face has also got black lines running through it.
In picture one of the entire rock face you can see that the entire rock face is about 30m tall and is slopped backwards. The rock face also faces to the south.
(Picture 2) looking straight on at a lower part of the rock face.
–-–

In picture 3 of the rock face you can see that as you look higher up the rocks get browner. This is evidence of weathering and oxidization in the rocks making them weaker at the top.
In kiwi point quarry 350 000 tones of greywacke are shipped out every year which means that the rocks in the pictures are mainly greywacke, which is a hard sedimentary sandstone and is grey in color and as you can see all the rocks are grey, apart from the brown weathered ones, which are just weathered greywacke.

A picture looking up the rock face.
(Picture 3)

At the bottom of the rock face there were also piles of brown colored rocks, this is evidence of weathering and erosion. Some parts of the rock face are flat as you can see in picture 2, but a majority is all jagged from broken of rocks. The black lines running through the rocks in picture 2 also resemble layering in the greywacke and as they are not straight they also show folding in the rocks. The black lines in between the greywacke I have identified as shale