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Capital Adventures
September 19th, 2007
06:25 pm
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Third of three.
 
Mineral



The thing about faults is they tend to be fractal in nature, appearing the same at all scales, and this is a bad documentary picture, as it has no scaling type object in it. The area of rock face shown is, at a guess, about 20 by 20 metres. I'm using this as my wallpaper at the moment.

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From:wcg
Date:September 19th, 2007 07:12 am (UTC)
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What is it? Seems dark for granite.
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From:dianavilliers
Date:September 19th, 2007 08:20 am (UTC)
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Greywacky, if I recall stage 1 geology correctly.
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From:wcg
Date:September 19th, 2007 11:50 am (UTC)
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Huh, a type of sandstone? (I had to look the word up, and all the things Google is finding say it's a kind of sandstone. I'd have thought it a harder igneous rock from the picture.)
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From:dianavilliers
Date:September 19th, 2007 12:32 pm (UTC)
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Yep, a type of sandstone. This paper, which I'll admit that I've only looked at the pictures in examines the exact area. Owhiro bay quarry to be exact. :)

http://www.rsnz.org/publish/nzjgg/1993/34.pdf
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From:wcg
Date:September 19th, 2007 01:26 pm (UTC)
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Ah! A hard sandstone with lots of igneous content. Is it used a lot in local construction? I'd imagine it is.
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From:dianavilliers
Date:September 19th, 2007 07:02 pm (UTC)
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It was. This quarry is closed now.
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