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 exhibitsortoruly xenolit. biotit., jeden kus g1513fylit sericitický, jeden kus g1558 migmatit, jeden kus - Krystalinikum g1250 okatá rula, jeden kus - Krystalinikum g1251 marienberg. pararula, jeden kus - Krystalinikum g1252 erlán, jeden kus - Krystalinikum g1253 okatá orthorula, jeden kus - Krystalinikum g1254 stř. zrn. dvojslídná pararula, jeden kus - Krystalinikum g1256 krystalický vápenec, jeden kus - Moldanubikum g1267 krystalický vápenec, jeden kus - Moldanubikum g1268 krystalický vápenec, jeden kus - Moldanubikum g1277 epidotisovaný porfyrit, stlačený, jeden kus, vrtné jádro g1291 epidotisovaný porfyrit, jeden kus, vrtné jádro g1292 | ||
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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]