Metamorphic Petrology

DJW's Metamorphic Petrology
Annotated links to material about metamorphic rocks, migmatites and granitoid rocks, and related areas of "hard-rock" geology.
http://www.earth.ox.ac.uk/~davewa/metpet.html

Phase equilibria in metamorphic rocks - thermodynamic background and petrological applications
Several PDF documents explaining both basic and advanced petrological methods to infer metamorphic pressure-temperature paths.
http://www.mineralogie.uni-wuerzburg.de/will/phaseequilibria.html