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You are browsing the archive for 2010 April 29.

29 April 2010

Sistine Delta

Today’s imagery put me in mind of two hands reaching for one another: What do you think? Shocking coincidence? Or a bit of a stretch?

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Mineral phantasms?

Ice… serpentine… halite… What do they all have in common? I’ve discussed mineral “ghosts” here before — really, those are only pseudomorphs, where one mineral’s chemistry becomes unstable due to a change in conditions, and then a new mineral forms in the same space. I’ve also brought up the issue of clasts of minerals which are unstable over the long term (ice). Last night, at the final meeting of the …

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