Question

why igneous rocks are called primary rocks

Answer 1

Igneous rocks  rocks are referred to as the primary rocks, because they represent the rocks which directly or indirectly provided materials for the formation of other types of rocks.

Magma erupts from volcanic eruptions and on reaching earths crust it is called lava and solidifies by cooling.Thus, cooling and solidification are the two distinct processes involved in the formation of igneous rocks.

In rock cycle the first rock that is formed is igneous rocks from them sedimentary rocks are formed and after that metamorphic rocks formed.

Answer 2

igneous rocks are called primary rocks because:

• Igneous rocks are primary rocks as in the rock cycle, they are on rocks which are formed first, and then do not have any organic remains.

• Igneous rock is any naturally occurring aggregate of minerals.

• Igneous rock formation takes place when hot, molten magma cools and hardens.

• Basalt, Pumice, etc., are some of the igneous rocks.
• Igneous rocks are those which are mostly formed by the cooling and solidification of the lava or magma and are further subdivided into two types-plutonic rock and volcanic rock.
• Plutonic rocks are formed when the magma cools followed by crystallization on the surface of Earth and volcanic rocks form when the minerals are formed by magma.

• Igneous rocks are primary rocks as in the rock cycle, they are on rocks which are formed first, and then do not have any organic remains.

• Igneous rock is any naturally occurring aggregate of minerals.

• Igneous rock formation takes place when hot, molten magma cools and hardens.

• Basalt, Pumice, etc., are some of the igneous rocks.
• Igneous rocks are those which are mostly formed by the cooling and solidification of the lava or magma and are further subdivided into two types-plutonic rock and volcanic rock.
• Plutonic rocks are formed when the magma cools followed by crystallization on the surface of Earth and volcanic rocks form when the minerals are formed by magma.

• Igneous rocks are primary rocks as in the rock cycle, they are on rocks which are formed first, and then do not have any organic remains.

• Igneous rock is any naturally occurring aggregate of minerals.

• Igneous rock formation takes place when hot, molten magma cools and hardens.

• Basalt, Pumice, etc., are some of the igneous rocks.
• Igneous rocks are those which are mostly formed by the cooling and solidification of the lava or magma and are further subdivided into two types-plutonic rock and volcanic rock.
• Plutonic rocks are formed when the magma cools followed by crystallization on the surface of Earth and volcanic rocks form when the minerals are formed by magma.
• Hence, igneous rocks are called primary rocks.

#SPJ6