microgranitic

microgranitic

(ˌmaɪkrəʊɡrəˈnɪtɪk)
adj
(Geological Science) consisting of, or relating to, microgranite
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
The [sup.40]Ar / [sup.39]Ar muscovite age of 384 [+ or -] 7 Ma from the John Lee Brook Granite together with the reported presence of white microgranitic veins cutting the adjacent Magaguadavic Granite, dated by U-Pb on zircon at 396 [+ or -] 1 Ma (Bevier 1990), suggested that the former was younger than the latter (McLeod 1990).
Grain type Frequency (%) Plagioclase feldspar mineral grains 50 quartz mineral grains 15 biotite mica flakes 12 polycrystalline-polymineralic (quartz-feldspar) microgranitic rock fragments 10 K-feldspar mineral grains 8 opaque iron oxide grains (probably magnetite) 3 hornblende (pale green) mineral grains 2 Table 2.