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klys (maker of Silmarils)9/27/2014 11:04:32 pm PDT

re: #39 Aunty Entity Dragon

Well, not really. I know what you are getting at (IE they all derive energy and material from the earth) but how they actually operate can be radically different from one volcano to another. Hawaiian volcanoes operate off of a stationary “hot spot” and the basltic magma has a chemical composition which reflects the low silca nature of the melt material (originally from deep mantle ultramafic peridotite)

In Iceland, you get something really weird…both hot spot deep melt composition magmas and also relatively shallow spreading center magmas from a different provenance. You get two different magma compositions that have nothing to really do with one another since the magmas originate in very different melt facies.

I really wanted to take geochemistry. Never was able to do so.

My Ph.D. thesis was all about how composition and temperature affects structure in silicate melts.

I’m having bad flashbacks. Clearly more gin required.