Question

What are the 4 most abundant minerals in the continental crust? What percentage do these 4 makeup of the total?

Answer 1

`SiO_2`,
`Al_2O_3`,
`CaO`,
`MgO`

Step-by-step explanation:

The four most abundant minerals in the continental crust are,
`SiO_2`,
`Al_2O_3`,
`CaO`,
`MgO`.

The percentages are

`SiO_2=60.6\%`

`Al_2O_3=15.9\%`

`CaO=6.4\%`

`MgO=4.7\%`

`SiO_2` is called quartz

`Al_2O_3` is called corundum

`CaO` is called calcium oxide or quick lime

`MgO` is called magnesium oxide or magnesia