* Granite: A coarse-grained, light-colored rock rich in quartz and feldspar. Often found in continental crust and mountain ranges.
* Rhyolite: A fine-grained, light-colored volcanic rock with similar composition to granite. Often associated with volcanic eruptions and calderas.
* Granodiorite: A rock similar to granite but with less quartz and more plagioclase feldspar. Commonly found in batholiths and other large igneous intrusions.
* Syenite: A rock primarily composed of alkali feldspar and dark minerals like hornblende or biotite. Can be found in both intrusive and extrusive settings.
* Trachyte: A volcanic rock with similar composition to syenite. Often associated with volcanic eruptions and caldera formation.
* Basalt: A fine-grained, dark-colored volcanic rock rich in pyroxene and olivine. Common in oceanic crust and volcanic islands.
* Gabbro: A coarse-grained, dark-colored intrusive rock with similar composition to basalt. Found in ocean floors and along continental margins.
* Diorite: An intermediate rock between felsic and mafic compositions. Contains both plagioclase feldspar and pyroxene, often in a speckled pattern. Found in both intrusive and extrusive settings.
* Andesite: A volcanic rock with similar composition to diorite. Often associated with volcanic arcs and subduction zones.
* Peridotite: An ultramafic rock composed mostly of olivine and pyroxene. Found in the Earth's mantle and sometimes brought to the surface by volcanic eruptions.
These are just a few examples. The classification of rocks can be complex, with variations within each category based on mineral composition and other factors. However, understanding the basic properties of felsic and mafic rocks can help you identify them in the field or in a museum setting.
