Elements in the continental crust*

 

Element

Symbol

Weight (%)

Oxygen

O

45.2

Silicon

Si

27.2

Aluminium

Al

8.0

Iron

Fe

5.8

Calcium

Ca

5.1

Magnesium

Mg

2.8

Sodium

Na

2.3

Potassium

K

1.7

Titatnium

Ti

0.9

Hydrogen

H

0.15

 

* After K.K. Turekian, 1969