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pyroxene

pyroxene

pyroxene Sentence Examples

  • The boulder is a crystalline rock consisting of pyroxene (chrome-diopside), garnet, and a little olivine, and is studded with diamond crystals; a portion of it is preserved in the British Museum (Natural History).

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  • The pyroxenes may be pale green diopside, dark green aegirine-augite, or blackish green aegirine (soda iron pyroxene), and in many cases are complex, the outer portions being aegirine while the centre is diopside.

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  • Both Great and Little Ararat consist entirely of volcanic rocks, chiefly andesites and pyroxene andesites, with some obsidian.

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  • The rocks are liparites, dacites, hornblende and pyroxene andesites.

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  • Quincy granite, a hornblende, pyroxene, bluish or greyish, without mica, was used for the construction of the Bunker Hill monument at Charlestown (in 1826), and of King's Chapel, Boston; and for interior decorations it has found some use, for example in the Philadelphia city buildings.

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  • The crystals belong to the monoclinic system, and it is a curious fact that in habit and angles they closely resemble pyroxene (a silicate of calcium, magnesium and iron).

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  • Often they contain quartz and felspar, sometimes pyroxene, amphibole, garnet or epidote.

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  • Hedenbergite, or calcium iron pyroxene, is a black mineral closely allied to diopside and, owing to the isomorphous replacement of iron by magnesium, there is no sharp line of division between them.

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  • Schefferite, or manganese pyroxene, is a brown mineral found in the manganese mines of Sweden.

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  • The other minerals found in the concentrates are pebbles and fragments of pyrope, zircon, cyanite, chrome-diopside, enstatite, a green pyroxene, mica, ilmenite, magnetite, chromite, hornblende, olivine, barytes, calcite and pyrites.

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  • Often they contain quartz and felspar, sometimes pyroxene, amphibole, garnet or epidote.

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  • calcic feldspar, pyroxene and commonly hornblende and/or olivine: appx.

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  • See also cut-off grade Gabbro A coarse grained igneous rock consisting of calcic feldspar, pyroxene and commonly hornblende and/or olivine: appx.

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  • The anorthosite and garnet - pyroxene - feldspar gneisses are intimately related and the complex was probably originally layered.

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  • mafic igneous rock consisting of plagioclase feldspar and pyroxene.

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  • The most common ferromagnesian minerals include olivine, pyroxene, amphibole and mica.

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  • The black gabbro contains pyroxene and pigmented plagioclase feldspars.

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  • Hedenbergite, or calcium iron pyroxene, is a black mineral closely allied to diopside and, owing to the isomorphous replacement of iron by magnesium, there is no sharp line of division between them.

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  • Schefferite, or manganese pyroxene, is a brown mineral found in the manganese mines of Sweden.

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  • The other minerals found in the concentrates are pebbles and fragments of pyrope, zircon, cyanite, chrome-diopside, enstatite, a green pyroxene, mica, ilmenite, magnetite, chromite, hornblende, olivine, barytes, calcite and pyrites.

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  • The boulder is a crystalline rock consisting of pyroxene (chrome-diopside), garnet, and a little olivine, and is studded with diamond crystals; a portion of it is preserved in the British Museum (Natural History).

    0
    0
  • The pyroxenes may be pale green diopside, dark green aegirine-augite, or blackish green aegirine (soda iron pyroxene), and in many cases are complex, the outer portions being aegirine while the centre is diopside.

    0
    0
  • Both Great and Little Ararat consist entirely of volcanic rocks, chiefly andesites and pyroxene andesites, with some obsidian.

    0
    0
  • The rocks are liparites, dacites, hornblende and pyroxene andesites.

    0
    0
  • The crystals belong to the monoclinic system, and it is a curious fact that in habit and angles they closely resemble pyroxene (a silicate of calcium, magnesium and iron).

    0
    0
  • Quincy granite, a hornblende, pyroxene, bluish or greyish, without mica, was used for the construction of the Bunker Hill monument at Charlestown (in 1826), and of King's Chapel, Boston; and for interior decorations it has found some use, for example in the Philadelphia city buildings.

    0
    0
  • The black gabbro contains pyroxene and pigmented plagioclase feldspars.

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