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Re: [APD] sand
Careful, Stewart. A LOT of ocean beach sand is crushed coral. The sand that builds up in freshwater streams and rivers is all kinds of things, but not Calcium carbonate.The balck sands that gold prospectors pull gold dust from as well as South Pacific black beach sand is volcanic in origin. I have seen black sand on the shore of Lake Erie near Fredonia NY that was bade of rushed black slate. All of this would move downstream and end up deposited on ocean shorelines by tidal action.
There is a study that shows that sand in Morocco is about 80% silicate. See it at http://www.gaef.de/EAC2007/EAC2007abstracts/T24Abstractpdf/T13A039.pdf. I suspect that if you could effectively survey ALL sand everywhere on the planet, most of it would be aluminum silicate or other silicates.
ate: Fri, 16 Sep 2011 10:05:33 +0100
rom: Stuart Halliday <stuart at mytriops_com>
ubject: Re: [APD] sand
o: aquatic plants digest <aquatic-plants at actwin_com>
On 15/09/2011 20:54, RMGTBTS at aol_com wrote:
yes sand does not interact with H2O. Would not be a lot of beaches.
>Sand is mostly calcium carbonate, ie the dead shells of invertebrate
animals. Course it dissolves in water! It is what gives water GH and KH. :)
00 Million years in the making...
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