Thread: Rock for ID?
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Old 21st October 2018
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Re: Rock for ID?

I was a geologist so I'll stick my neck out

I do think it is quartz veining in a mudstone

I am not sure of the scale which is why geologists always include something of known size in the picture - good tip a coin is known size and if you have nothing better a lens cap which is not known size, but allows a sense of overall scale from huge to medium etc. Some examples like this in my website http://www.shenstone.me.uk/galleries...nts/index.html

Back to yours. I think at the scale I think it is that I would see the crystaline structure of gypsum or calcite

Re the vein's there is a slight curve to them. When you see veins all with S type curves you can tell which way the pressure has come from - not enough to tell direction of strain from in this picture IMO

Hope that helps

Regards
Andy
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