1) Plutonic rock
Found on
https://www.crosswordclues.com/clue/shonkinite
Shonkinite is a mafic foidal (feldspathoid bearing) syenite, an intrusive, holocrystalline rock which in the restricted sense is composed of potassic feldspar in the form of sanidine, nepheline, augite, biotite, and olivine. Shonkinite is also used for mafic nepheline syenite with aegerine-augite as the pyroxene, and with the addition of plagiocla...
Found on
http://en.wikipedia.org/wiki/Shonkinite
rare, dark-coloured, intrusive igneous rock that contains augite and orthoclase feldspar as its primary constituents. Other minerals include ...
Found on
http://www.britannica.com/eb/a-z/s/85
No exact match found.
