Meaning of microgranite in English:


Pronunciation /ˈmʌɪkrə(ʊ)ɡranɪt/


mass nounGeology
  • Granite that is recognizable as crystalline only under a microscope.

    ‘This is a coarsegrained biotite gneiss with an average granodioritic composition, that is generally fairly homogeneous but locally shows gneissic banding, and is intruded by veins of microgranite and pegmatite.’
    • ‘The age of the Carrock microgranite provides further evidence that both calc-alkaline and tholeiitic magmas were available during Caradoc magmatism in the Lake District.’
    • ‘The microgranite has a felsitic groundmass containing microphenocrysts of albite and orthoclase along with phenocrysts of corroded quartz and sporadic dihedral garnet; zircon and apatite are conspicuous accessory minerals.’
    • ‘The microgranite has been dated at 416 + or - 20 Ma.’