31. Basalt and gabbro commonly exhibit an equigranular texture. 32. It was also discovered that the meteorite had similarities to terrestrial gabbro or basalt. 33. The terrane contains mostly gabbro and gneiss that show intrusions of granite and dolerite. 34. Intermediate rocks are termed gabbro -norite. 35. Their essential minerals are pyroxene, plagioclase and garnet : chemically they resemble the gabbros . 36. Its geology features intrusive igneous rock formations, such as gabbro , combined with serpentine. 37. Gabbro weathers to a darker red soil than granodiorite or other quartz-rich rock.38. Often, cumulate layers are polyminerallic, forming gabbro , norite and other rock types. 39. Silurian rocks include the Iron Hill Gabbro , Bringhurst Gabbro, and Arden Plutonic Supersuite. 40. Silurian rocks include the Iron Hill Gabbro, Bringhurst Gabbro , and Arden Plutonic Supersuite.
