Oceanic Crust:
* Basalt: This is the dominant rock type in the oceanic crust. Basalt is a dark-colored, fine-grained igneous rock that is rich in silica (SiO2), magnesium (Mg), and iron (Fe).
* Gabbro: This is the intrusive equivalent of basalt. It is a coarse-grained igneous rock with similar mineral composition to basalt.
Continental Crust:
* Granite: This is the most common rock type in the continental crust. Granite is a light-colored, coarse-grained igneous rock that is rich in silica (SiO2), aluminum (Al), sodium (Na), and potassium (K).
* Other minerals: Continental crust is also composed of various other minerals like quartz, feldspar, mica, and hornblende.
In summary: While both oceanic and continental crust contain a variety of minerals, silica (SiO2) is the most abundant element in both. However, oceanic crust is relatively enriched in magnesium (Mg) and iron (Fe), while continental crust is enriched in aluminum (Al), sodium (Na), and potassium (K).
