oligoclase

NOUN
  1. any of a series of triclinic feldspars that form rocks
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How To Use oligoclase In A Sentence

  • They recognized kyanite-staurolite assemblages in pelites to the north of the Annagh Gneiss Complex exposures, but only garnet and oligoclase to the south.
  • It is composed of quartz, oligoclase, and microcline, with minor garnet, biotite, muscovite and iron-oxides.
  • Here it was found sparsely as rounded grains associated with pargasite, diopside, oligoclase and lazurite.
  • They are divisible into two great classes, which have received the names of diorite and dolerite, the former a mixture of albite and hornblende, the latter of augite and labradorite, sometimes with considerable quantities of a sort of oligoclase containing both soda and lime, and of different kinds of zeolitic minerals. Elements of Agricultural Chemistry
  • They range from bytownite - labradorite in basalts and gabbros, andesine - oligoclase in diorites and andesites to albite in granites and rhyolites.
  • However, this assumption is inconsistent with the fairly simultaneous appearance of the second garnet generation and oligoclase.
  • Granite sample RHGI can be modelled by continuing this felsic scheme, for example with 22% fractionation of oligoclase, amphibole, biotite and the usual minor apatite and titanite.
  • They range from bytownite - labradorite in basalts and gabbros, andesine - oligoclase in diorites and andesites to albite in granites and rhyolites.
  • There are, for instance, several different minerals commonly classified under the name of felspar, which have been distinguished by mineralogists by the names of orthoclase, albite, oligoclase, and labradorite; and there are at least two sorts of mica, two of hornblende, and many varieties of zeolites. Elements of Agricultural Chemistry
  • They are divisible into two great classes, which have received the names of diorite and dolerite, the former a mixture of albite and hornblende, the latter of augite and labradorite, sometimes with considerable quantities of a sort of oligoclase containing both soda and lime, and of different kinds of zeolitic minerals. Elements of Agricultural Chemistry
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