Definition of feldspathic in English:

feldspathic

adjective

Geology
  • (of a mineral or rock) of the nature of or containing feldspar.

    • ‘The coarse-grained sandstone matrix is dominated by feldspathic litharenites with 50-70% quartz, 2-5% K-feldspar and 10-15% plagioclase.’
    • ‘The turbidites and their migmatized schistose equivalents overlie the grey feldspathic arenites but it is unclear whether this relationship is stratigraphic or the result of tectonic stacking.’
    • ‘Compositionally, the turbidites are mostly feldspathic litharenites with trace amounts of serpentinite, anorthosite and mafic volcanic clasts.’
    • ‘Neither sample showed optical evidence for postformation alteration in the form of chloritized veins or sericitization of feldspathic minerals or micas.’
    • ‘The lower member is dominated by a thick basal dolomite and passes transitionally upwards into the psammitic upper member, which is largely feldspathic schist and quartzite.’

Pronunciation:

feldspathic

/fɛldˈspaθɪk/