Tuesday 3 September 2013

Helluhraun


Helluhraun is an Icelandic word for a geological feature that, in English, has a Hawaiian word (pahoehoe) to describe it.

This is a ropey surface that forms on a very fluid mafic lava flow, like the skin on a custard that wrinkles up when it is poured. 

I thought it would be a good way to welcome you all back for the new school year.

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