Alpine notes
Blueschist (with glaucophane) Blueschist (with glaucophane)
Lawsonite Lawsonite
Schistes lustres Schistes lustres
Coesite Coesite
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Rocks that crop out in the internal zones of the Alps were once deeply buried. We know this because the original character of the rocks (e.g. sediments or igneous) has been altered - metamorphosed. Although the bulk composition of the new rocks may have remained unchanged from that of the precursor - new minerals have replaced the old ones. We know the conditions under which the reactions occur and so can reconstruct the temperature and pressure of the metamorphic rocks. If we can tell when the minerals grew relative to deformation, then we can tell under what conditions the deformation happened. Click on the icons to see some examples of metamorphic rocks from the Alps.

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