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At 10:17 05/11/01 +0000, vous avez écrit:
>And I wondered why students were being put off metamorphic geology...

is it so different in magmatic petrology ?

only some examples which disturb the metamorphic petrologist who I am : 
could you give me the difference (and similarities) betwen Q Diorite, 
trondhjemite and tonalite ? Is the term enderbite really useful ? why some 
geologists use the name andesite for intermediate rocks of the alkaline 
series and not only for the calco alcaline series ? ....
Christian
http://christian.nicollet.free.fr/