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June 12, 2011


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"So, sand misbehaving: clogged-up porosity, plugged-up permeability, and screwed-up electrical properties."

It isn't the sand misbehaving,it's that nasty, vicious, evil clay that turns perfectly fine sandstone into clay-packed graywacke. I'm familiar with smectite in another situation: it's the stuff that makes the "soil" in my backyard suitable for making bricks rather than cultivating vegetables.

Very cool pictures, by the way. I've never seen sandstones under a SEM before.

Good point, Karen - I shouldn't be blaming the sand grains, it's just a problem with the company they keep, their poor taste in pore-space guests!

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