 Biotite is present in many sections of the gabbro, though not in all. It not only occurs in the neighborhood of magnetite, where this mineral is in contact with plagioclase, but it is sometimes found imbedded in the feldspar and augite, and at other times...  Records of the Geological Survey of India - Page 386by Geological Survey of India - 1926Full view - About this book
 | Electronic journals - 1893 - 988 pages
...where this mineral is in contact with plagioclase, but it is sometimes found imbedded in the feldspar and augite, and at other times it forms a mosaic with decomposed diallage. In basal sections it is reddish brown, and in longitudinal sections is light yellow normal to the cleavage,... | |
 | Electronic journals - 1893 - 912 pages
...where this mineral is in contact with plagioclase, but it is sometimes found imbedded in the feldspar and augite, and at other times it forms a mosaic with decomposed diallage. In basal sections it is reddish brown, and in longitudinal sections is light yellow normal to the cleavage,... | |
 | Geology - 1916 - 178 pages
...where this mineral is in contact with plagioclase, but it is sometimes found imbedded in the feldspar and augite, and at other times it forms a mosaic with decomposed diallage. In basal sections it is reddish brown, and in longitudinal sections is light yellow normal to the cleavage,... | |
 | Geology - 1918 - 664 pages
...where this mineral is in contact with plagioclase, but it is sometimes found imbedded in the feldspar and augite. and at other times it forms a mosaic with decomposed dial! age. In basal sections it is reddish brown, and in longitudinal sections is light yellow normal... | |
 | Electronic journals - 1893 - 910 pages
...where this mineral is in contact with plagioclase, but it is sometimes found imbedded in the feldspar and augite, and at other times it forms a mosaic with decomposed diallage. In basal sections it is reddrsh brown, and in longitudinal sections is light yellow normal to the cleavage,... | |
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