Sentence Examples


  • In the mica-schists of this group biotite or muscovite may be the principal mineral and often both are present in varying proportions; the mica has developed from the argillaceous matter of the original rock; in addition there is always quartz and sometimes felspar (albite or oligoclase).
  • Calc-schists are usually argillaceous limestones in which a large development of biotite or phlogopite has occasioned foliation.
  • It is not volcanic, but consists of argillaceous schist and quartzite.
  • Argillaceous brown iron ore is often known in Germany as Thoneisenstein; but the corresponding term in English (clay iron stone) is applied to nodular forms of impure chalybite.
  • In addition to the reddish or brownish argillaceous matrix it contains fresh or decomposed crystals of volcanic minerals, such as felspar, augite, hornblende, olivine and pumiceous or palagonitic rocks.
 

Words near argillaceous in the dictionary