The New Encyclopædia BritannicaEncyclopædia Britannica, 1992 |
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Page 60
... feldspar ; the remain- der is mostly pyroxene . In diabase , poorly formed pyroxene crystals wrap around or mold against long , rectangular plagioclase crystals to give it the characteristic texture known as diabasic or ophitic . The ...
... feldspar ; the remain- der is mostly pyroxene . In diabase , poorly formed pyroxene crystals wrap around or mold against long , rectangular plagioclase crystals to give it the characteristic texture known as diabasic or ophitic . The ...
Page 112
... feldspar and one- third dark - coloured minerals , such as horn- blende or biotite . The presence of sodium- rich feldspar , oligoclase or andesine , in con- trast to calcium - rich plagioclase , labradorite or bytownite , is the main ...
... feldspar and one- third dark - coloured minerals , such as horn- blende or biotite . The presence of sodium- rich feldspar , oligoclase or andesine , in con- trast to calcium - rich plagioclase , labradorite or bytownite , is the main ...
Page 567
... feldspar , as well as orthoclase feldspar , augite , biotite , hornblende , olivine , and nepheline . As the proportion of nepheline increases , essexite grades into theralite . Essling , André Masséna , prince d ' : see Masséna , André ...
... feldspar , as well as orthoclase feldspar , augite , biotite , hornblende , olivine , and nepheline . As the proportion of nepheline increases , essexite grades into theralite . Essling , André Masséna , prince d ' : see Masséna , André ...
Contents
14 written for Catherine the Great Observations | 14 |
Consult the INDEX first | 581 |
Didius Julianus marble bust in | 703 |
Copyright | |
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