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2. Granite - Wikipedia

   en.wikipedia.org/wiki/Granite

   Granite (/ ˈ ɡ r æ n ɪ t / GRAN-it) is a coarse-grained intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase.It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground.

3. Formation of rocks - Wikipedia

   en.wikipedia.org/wiki/Formation_of_rocks

   Rock can also form in the absence of a substantial pressure gradient as material that condensed from a protoplanetary disk, without ever undergoing any transformations in the interior of a large object such as a planet or moon. Astrophysicists classify this as a fourth type of rock: primitive rock. This type is common in asteroids and meteorites.

4. Stone Mountain - Wikipedia

   en.wikipedia.org/wiki/Stone_Mountain

   This magma solidified to form granite within the crust 5 to 10 miles (8 to 16 km) below the surface. The Stone Mountain pluton continues underground 9 miles (14 km) at its longest point into Gwinnett County. Numerous reference books and Georgia literature have dubbed Stone Mountain as "the largest exposed piece of granite in the world". [9]

5. Decomposed granite - Wikipedia

   en.wikipedia.org/wiki/Decomposed_granite

   Decomposed granite path. Decomposed granite, as a crushed stone form, is used as a pavement building material. It is used on driveways, garden walkways, bocce courts and pétanque terrains, and urban, regional, and national park walkways and heavy-use paths. DG can be installed and compacted to meet handicapped accessibility specifications and ...

6. Sierra Nevada Batholith - Wikipedia

   en.wikipedia.org/wiki/Sierra_Nevada_Batholith

   Half Dome, Yosemite, a classic granite dome of the Sierra Nevada Batholith. The Sierra Nevada Batholith is a large batholith that is approximately 400 miles long and 60-80 miles wide which forms the core of the Sierra Nevada mountain range in California, exposed at the surface as granite.

7. Fractional crystallization (geology) - Wikipedia

   en.wikipedia.org/wiki/Fractional_crystallization...

   One example concerns crystallization of melts that form mafic and ultramafic rocks. MgO and SiO 2 concentrations in melts are among the variables that determine whether forsterite olivine or enstatite pyroxene is precipitated, [11] but the water content and pressure are also important. In some compositions, at high pressures without water ...