The New Encyclopaedia Britannica: A - K.Encyclopaedia Britannica, 2005 |
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Page 238
... percent Q and 80 percent A + P ( in unknown proportions for the moment ) will plot on the line that parallels the AP side and lies 20 percent of the distance toward Q from the side AP . If this same rock has 30 percent P and 50 percent ...
... percent Q and 80 percent A + P ( in unknown proportions for the moment ) will plot on the line that parallels the AP side and lies 20 percent of the distance toward Q from the side AP . If this same rock has 30 percent P and 50 percent ...
Page 239
... percent compared to 45 to 63 percent for the former ) . Hornblende and biotite phenocrysts are common in the calc - alkalic andesites and dacites but are lacking in the tholeiites except as alteration products . The dacites and ...
... percent compared to 45 to 63 percent for the former ) . Hornblende and biotite phenocrysts are common in the calc - alkalic andesites and dacites but are lacking in the tholeiites except as alteration products . The dacites and ...
Page 241
... percent of SiO2 by weight Figure 114 : Phase diagram of a part of the Mg2SiO , ( forsterite , or Fo ) -SiO2 ( silica ) system at one atmosphere of pressure . En = enstatite and L = liquid ... percent An + 40 percent Ab Minerals and Rocks 241.
... percent of SiO2 by weight Figure 114 : Phase diagram of a part of the Mg2SiO , ( forsterite , or Fo ) -SiO2 ( silica ) system at one atmosphere of pressure . En = enstatite and L = liquid ... percent An + 40 percent Ab Minerals and Rocks 241.
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albite amphiboles ancient aragonite areas atoms basalt bivalves body calcite calcium called carbonate central centre century cephalopods chemical clay minerals colour common composition contain crust crystals ctenidia cult cultural deities deposits developed dolomite Earth economic eggs electron evaporite example existence facies feldspar Figure garnet gastropods goddess gods grains Hittite human igneous rocks important industrial kaolinite king known layers limestone magma magnetic major mantle cavity marine material mental metamorphic rocks metaphysics Mexican Mexico City mica Michelangelo microscope millimetres Milton mimicry mind Mineralogy modern Molière Mongolia Mongols Moscow myth nature object occur ocean olivine organic originally oxide percent period philosophers physical plagioclase political population pressure produced properties pyroxene quartz reaction region religion religious reprinted result sandstones sedimentary rocks sediments shell silicate smectite snails society species structure Sumerian surface temperature temple tetrahedrons texture tion typically United urban volcanic