41. The host rock for porphyry copper deposits in southeast Asia is typically diorite and quartz-diorite. 42. The host rock for porphyry copper deposits in southeast Asia is typically diorite and quartz-diorite . 43. Ben Lomond's geology is dominated by granite, mica schist, diorite , porphyry and quartzite. 44. "Lunar granites " are relatively rare rocks that include diorites , monzodiorites, and granophyres. 45. Locally, quartz diorite or gneiss bodies occur on the arkose-schist contact west of Government Peak. 46. The soils are of residual-colluvial parent material which are igneous rocks; grained diorite and shale. 47. There have been some small intrusions of magma into the graben appearing now as granito-diorite outcrops. 48. Moreover, the effusive andesites do not always correspond to the plutonic diorites but partly also to the gabbros. 49. The most common rock types in plutons are granite, granodiorite, tonalite, monzonite, and quartz diorite . 50. Erie itself can be observed at the summit of the mountain as large striations in the diorite and gabbro.
