Rocks and Rock Minerals: A Manual of the Elements of Petrology Without the Use of the Microscope, for the Geologist, Engineer, Miner, Architect, Etc., and for Instruction in Colleges and SchoolsJ. Wiley & sons, 1913 - 414 pagina's |
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Veelvoorkomende woorden en zinsdelen
acid alkalies alteration alumina amount Analysis basalts beds biotite blowpipe calcite carbonate character chemical composition chiefly chlorite clay cleavage color common compact composed contain crystal form crystalline dark dense deposits described dikes diorite dolerite dolomite epidote especially feldspar felsite ferromagnesian minerals fracture gabbros garnet geological glass gneisses granite granular gray green groundmass gypsum H₂O heated hematite hornblende hydrochloric igneous rocks important intrusive iron laccoliths lavas lens less lime limestones limonite luster magma magnesia marble material megascopic metamorphic rocks mica microscope mineral grains muscovite nephelite occur olivine origin orthoclase oxides particles pegmatite peridotites petrographers phenocrysts porphyries present prisms produced pyroxene quartz quartzite rare rock masses rock minerals sandstones schistose schists scratched sedimentary rocks seen serpentine shales silica SiO2 Small 8vo soluble solution sometimes specific gravity stratified structure substance surface syenite texture tourmaline usually varies varieties volcanic zone
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