22. Lewis Pass Gravel

Updated: Oct 1, 2020

Based on 'Rock glazes of NZ' Minna Bondy

Sample 80. Lewis Pass Gravel

Mainly Quartz and Feldspar. Also a good deal of very fine probably clayey material, probably derived from shist.

42°30'40.7"S 172°23'11.3"E

I was puzzled with the description of this sample and wondered if gravel from Lewis Pass in the 1950s was still there in 2020? As I drove, the pass opened into a vast valley with high cliffs on either side that were exposed and crumbling.

These cliffs are referred to as moraine, a glacier-formed material ground by a river of ice during the last ice age. Definitely been there for a while!

There are many road cuttings in the Lewis Pass where the moraine is exposed. This photo doesn't do justice to the scale, this was a mountain of gravel, note the car for scale in the landscape.

22A, 22B










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