I've hidden a big chunk but not all of the Bose-Einstein condensate part of your message. If you feel you must discuss such things,
propose a new topic.
NO REPLIES TO THE ADMIN/MODERATION PORTION OF THIS TOPIC.
Adminnemooseus
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Now some non-admin (Minnemooseus) comments:
As I recall, two factors control the grain size of igneous rocks.
1) The cooling rate. Large masses of magma take a long time to cool and thus have larger grain sizes.
2} Volatile content: "Wet" magmas, containing lots of water and other volatile components, solidify to larger crystals. That is why you get ultra-course grained pegmatites. On the other hand (if I recall correctly) obsidians (felsic volcanic glass) have very low volatile components.
Reference for above added 10/2/08:
Crystal Sizes and Pegmatite Dikes
Re: Bluescat48's message 40:
Bluescat48 writes:
The halos only occur after the rock has become an outcrop...
I assume you meant to say that the halos only occur after the rock has solidified. Being an outcrop means that the rock is exposed at the surface, which has very little to do with the rocks nature.
Minnemooseus
Edited by Adminnemooseus, : Add link.