petrography 116 mineralogy 38 geology 23 rocks 8 coal 8 geochemistry 6 regional geology 5 more ... eruptive rock 5 geologic formations 3 construction materials 3 building stone 3 evolution of lithosphere 3 material testing 3 Earth 2 chemistry 2 physical properties 2 geophysics 2 geologické poměry 2 stone 2 jurassic period 2 forestry 2 caustobiolite deposits 2 deposit geology 2 minerals 2 petrologie 2 ores 2 stratigraphy 2 tectonics 2 mining 2 mining engineering 2 less ...