Category:Igneous rocks in the United States by silicon dioxide content

• Igneous rocks in Oregon by silicon dioxide content (4 C)
• Igneous rocks in the United States by state by silicon dioxide content (18 C)

*

• Volcanism of the United States by silicon dioxide content of igneous rocks (2 C)

F

• Felsic rocks in the United States (22 C, 1 F)
• Felsic rocks in the United States by geochronology (4 C)

I

• Intermediate rocks in the United States (15 C)
• Intermediate rocks in the United States by geochronology (4 C)

M

• Mafic rocks in the United States (15 C, 2 F)
• Mafic rocks in the United States by geochronology (4 C)

U

• Ultramafic rocks in the United States (8 C)