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They're described as felsic igneous rocks.
aluminum and potassium
The Earth's crust is formed mainly from the elements aluminum, silicon and oxygen in the form of silicates & aluminum oxides and occurring as silicate rocks.Silicate minerals are abundant in all three rock types (igneous, metamorphic, and sedimentary) comprising the crust, but the crust is composed mainly of silicate rich igneous rock. The continental crust is composed of the lighter 'felsic' igneous rock (granitic in nature), higher in aluminum, sodium, and potassium; the oceanic crust is composed of the heavier, darker, 'mafic' igneous rock (largely basalt) which is higher in iron and magnesium than the continental crust.Crust composition: Oxygen, Silicon, Aluminum, Iron, in that order.Overall composition of the entire Earth: Iron, Oxygen, Silicon, Aluminum, in that order.Magnesium and Iron
the crust
Aluminum, of course. Silicon is a metalloid while Aluminum is a metal.
They're described as felsic igneous rocks.
aluminum and potassium
The mantle has oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium, and titanium in it.
KAlSi3O8 Potassium, aluminum, silicon, and oxygen.
The seven main elements commonly found in igneous rocks are silicon, oxygen, aluminum, iron, calcium, sodium, and potassium. These elements make up the minerals that compose igneous rocks and give them their characteristic properties.
The Earth's crust is formed mainly from the elements aluminum, silicon and oxygen in the form of silicates & aluminum oxides and occurring as silicate rocks.Silicate minerals are abundant in all three rock types (igneous, metamorphic, and sedimentary) comprising the crust, but the crust is composed mainly of silicate rich igneous rock. The continental crust is composed of the lighter 'felsic' igneous rock (granitic in nature), higher in aluminum, sodium, and potassium; the oceanic crust is composed of the heavier, darker, 'mafic' igneous rock (largely basalt) which is higher in iron and magnesium than the continental crust.Crust composition: Oxygen, Silicon, Aluminum, Iron, in that order.Overall composition of the entire Earth: Iron, Oxygen, Silicon, Aluminum, in that order.Magnesium and Iron
silicon, aluminum, calcium, sodium and potassium
silicon, aluminum, calcium, sodium and potassium
No Igneous rock is consistently a compound - a mixture of elements. Although there are variations in composition, igneous rock is usually made up of roughly half oxygen, roughly one quarter silicon, and lesser, but significant, quantities of aluminum, calcium, sodium, potassium, and magnesium., with a sprinkling of other elements.
the crust
Oxygen, Silicon, Aluminum, Iron, Calcium, Sodium, Potassium, and Magnesium
Oxygen, Silicon, Aluminum, iron, calcium, sodium, potassium, magnesium