The New Encyclopaedia Britannica: A - K.Encyclopaedia Britannica, 2005 |
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Page 194
... Pigeonite Calcium pyroxenes Augite Diopside Hedenbergite Johannsenite Calcium - sodium pyroxenes Omphacite Aegirine - augite Sodium pyroxenes Jadeite Aegirine ( acmite ) Kosmochlor ( ureyite ) Lithium pyroxenes Spodumene Mg2Si2O Fe2 + ...
... Pigeonite Calcium pyroxenes Augite Diopside Hedenbergite Johannsenite Calcium - sodium pyroxenes Omphacite Aegirine - augite Sodium pyroxenes Jadeite Aegirine ( acmite ) Kosmochlor ( ureyite ) Lithium pyroxenes Spodumene Mg2Si2O Fe2 + ...
Page 196
... pigeonite crystal ; clinohypersthene in thin lamellae has separated from the calcium - rich augite , and augite has separated from the pigeonite before it inverted to hypersthene ( gray ; magnified about 21.1X ) . Figure 54 ...
... pigeonite crystal ; clinohypersthene in thin lamellae has separated from the calcium - rich augite , and augite has separated from the pigeonite before it inverted to hypersthene ( gray ; magnified about 21.1X ) . Figure 54 ...
Page 197
... pigeonite from a gabbro . Augite , seen as brightly coloured thin lamellae with herringbone texture because of the twinned relationship , has separated from the pigeonite ; further cooling has caused the host , gray - coloured ...
... pigeonite from a gabbro . Augite , seen as brightly coloured thin lamellae with herringbone texture because of the twinned relationship , has separated from the pigeonite ; further cooling has caused the host , gray - coloured ...
Common terms and phrases
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