Describe the main characteristics that determine chemical composition of igneous rocks
Answers
Explanation:
The minerals provide details on the chemical composition of the rock, and on the conditions in which the magma originated, cooled, and solidified. ... Magmas come in a range of compositions, from rich in silica and poor and iron and magnesium (felsic) to moderate in silica and high in iron and magnesium (mafic).
Magma is molten rock inside the earth. It is the source of all igneous rock. Because the earth was largely molten at its origin, magma may be considered the beginning of the rock cycle. Igneous rocks contain information about how they originate. By carefully analyzing igneous rocks and interpreting the information they contain, we can deduce processes that take place within the earth and we can understand volcanic processes that take place on the earth’s surface.