Metamorphites
The metamorphic rocks are derived from pre-existing sedimentary and magmatic rocks by mineralogical, chemical, and structural changes, essentially in the solid state, in response to marked changes in temperature and/or pressure (both hydrostatic and oriented), during deeper burial into deeper parts of the Earth´s crust. During these processes parallel orientation of newly formed minerals generally forms (schistosity). Hydrothermal metamorphism represents a special type, because it is related to the migration of solutions near ore veins. Contact metamorphism results from temperature effect near contact with magmatite bodies.
List of exhibitspararula - cordierit. biotit., jeden kus g5706kvarcit - světlý, slídnatý, jeden kus g5716 fylit, jeden kus g5717 fylit - kvarcitický sericit., jeden kus g5718 svor, jeden kus g5719 fylit - chloriticko-sericit., dva kusy g5721 svor, biotit.- musk.až sv.rula, jeden kus g5725 fylit - albiticko-chloriticko-sericitický, jeden kus g5726 kvarcit - pyroxenický, jeden kus g6005 migmatit, jeden kus g6006 pararula, jeden kus g6007 erlán - pararulový stromatit, jeden kus g6008 migmatit - cordieriticko-biot., jeden kus g6009 erlán, jeden kus g6010 pararula - silimanit.-biotitic, jeden kus g6011 mramor /kalcitický/, jeden kus g6012 migmatit /biotitický/, jeden kus g6013 svor - albitický muskovitický, jeden kus g6018 svor - kvarcitický,grafitický, jeden kus g6020 kvarcit- algonkium, jeden kus g6021 | ||
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Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]