Cae Coch Sulphur Mine - Deeper Inside

[Ian A]

http://www.youtube.com/watch?v=dc4nBtqVy4c

[John Oh]

Great Video Ian, I can't believe how much light underwater  bulb gave off in the video, shame my camera didn't see as much. Like you Pictures too, especially DSCF2976a.jpg

Good trip, even if it was a bit S***** than I would have liked.

John.

[Ian A]

[quote="JohnO" post=2573] I can't believe how much light underwater  bulb gave off in the video, shame my camera didn't see as much.
John.[/quote]

You have way too many buttons that's why !



Ian

[Vikki Sestan]

Great video Ian, it was a shame I couldn't make this trip.

[Dave Tyson]

Excellent video Ian. I think the fine transparent crystals are not calcite (CaCo3), but rather gypsum (CaSO4) formed by the action of sulphur dioxide from the pyrites acting on calcium rich water. The pale green crystals are ferrous sulphate formed by oxidation of the pyrites.

Dave
(who used to be a chemist!)

[Ian A]

Thanks Dave ... that's precisely the kind of info and help that is muchly appreciated

I did wonder about about the "green" - there is a fabulous display of it in Ystrad Einion and I recognise that as ferrous sulphate (iron (II) sulphate); I just wasn't sure if it was the same :dry:

Muchas Grathias



Ian