 ... above, the feldspathic constituent consists of the potash and soda-lime feldspars, with the potash varieties predominating. The porphyritic feldspars are chiefly orthoclase with some microcline, carrying inclusions of all the groundmass minerals....  Bulletin of the United States Geological Survey - Seite 250von Geological Survey (U.S.) - 1910Vollansicht - Über dieses Buch
 | Thomas Chrowder Chamberlin - 1901 - 1068 Seiten
...inclusions of all the groundmass minerals. The included biotite shreds are visible macroscopically. Some of the largest plagioclase inclusions in the...the included feldspar species is commonly observed. Biotite shows its usual characteristic optical properties, and is partially altered to chlorite and... | |
 | Thomas Chrowder Chamberlin - 1901 - 1072 Seiten
...inclusions of all the groundmass minerals. The included biotite shreds are visible macroscopically. Some of the largest plagioclase inclusions in the...the included feldspar species is commonly observed. Biotite shows its usual characteristic optical properties, and is partially altered to chlorite and... | |
 | Thomas Leonard Watson - 1902 - 464 Seiten
...feldspars interlocked with quartz and biotite. Some of the largest lath-shaped plagioclases, included in the orthoclase phenocrysts, carry, in turn, microscopic inclusions of quartz and other minerals. A number of the enclosed feldspars in the porphyritic mineral are twinned after the Carlsbad... | |
 | 1902 - 462 Seiten
...feldspars interlocked with quartz and biotite. Some of the largest lath-shaped plagioclases, included in the orthoclase phenocrysts, carry, in turn, microscopic inclusions of quartz and other minerals. A number of the enclosed feldspars in the porphyritic mineral are twinned after the Carlsbad... | |
 | George Samuel Rice - 1910 - 820 Seiten
...A thin section of one of the phenocrysts from the mam outcrop showed the characteristic microcline structure, with numerous inclusions of irregular grains...because of its remoteness from lines of railroad. OKANITE GNEISSES. INTRODUCTORY STATEMENT. A major part of the granitic rocks in the Piedmont region... | |
 | Thomas Chrowder Chamberlin - 1901 - 788 Seiten
...inclusions of all the groundmass minerals. The included biotite shreds are visible macroscopically. Some of the largest plagioclase inclusions in the...the included feldspar species is commonly observed. Biotite shows its usual characteristic optical properties, and is partially altered to chlorite and... | |
 | Georgia. Department of Mines, Mining, and Geology - 1902 - 464 Seiten
...feldspars interlocked with quartz and biotite. Some of the largest lath-shaped plagioclases, included in the orthoclase phenocrysts, carry, in turn, microscopic inclusions of quartz and other minerals. A number of the enclosed feldspars in the porphyritic mineral are twinned after the Carlsbad... | |
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