granitic magma
71feldspar — /feld spahr , fel /, n. any of a group of minerals, principally aluminosilicates of potassium, sodium, and calcium, characterized by two cleavages at nearly right angles: one of the most important constituents of igneous rocks. Also, felspar.… …
72Oldest dated rocks — The oldest dated rocks on Earth, as an aggregate of minerals that have not been subsequently melted or disaggregated by erosion, are from the Archean Eon. Such rocks are exposed on the surface in very few places.[1] There is some controversy… …
73Gneiss — rock Augen gneiss from Rio de Janeiro, Brazil …
74Syenite — is a coarse grained intrusive igneous rock of the same general composition as granite but with the quartz either absent or present in relatively small amounts ( …
75Boulder, Montana — Infobox Settlement official name = Boulder other name = native name = nickname = settlement type = Town motto = imagesize = 250px image caption = Jefferson County Courthouse in Boulder flag size = image seal size = image shield = shield size =… …
76Basin, Montana — Infobox Settlement official name = Basin settlement type = CDP nickname = motto = imagesize = 250px image caption = Basin Street image image mapsize = 250px map caption = Location of Basin, Montana mapsize1 = 250px map caption1 = subdivision type …
77Blue Ridge Mountains — Geobox|Range name=Blue Ridge Mountains image caption=Blue Ridge Mountains, Shining Rock Wilderness Area country=United States state=Georgia | state1=North Carolina | state2=Tennessee |state3=Virginia | state4=Maryland | state5=Pennsylvania | |… …
78Geology of the Grand Teton area — The geology of the Grand Teton area consists of some of the oldest rocks and one of the youngest mountain ranges in North America. The Teton Range, mostly located in Grand Teton National Park, started to grow some 9 million years ago. An older… …
79Kenorland — was one of the earliest supercontinents on Earth. It is believed to have formed during the Neoarchaean Era 2.7 billion years ago (2.7 Ga) by the accretion of Neoarchaean cratons and the formation of new continental crust. Kenorland comprised what …
80Aplite — (pronEng|ˈæplaɪt) in petrology, the name given to intrusive rock in which quartz and feldspar are the dominant minerals. Aplites are usually very fine grained, white, grey or pinkish, and their constituents are visible only with the help of a… …
