Civil Engineering - Building Materials - Discussion

Igneous rocks are formed due to the solidification of molten magma laying below or above the earth's surface.

Extrusive igneous rocks:these rocks are formed due to the solidification of molten magma laying on the surface of earth eg basalt.

Intrusive igneous rocks. Rocks formed due to solidification of molten magma inside the crust.

1. Plutonic igneous rocks: rocks formed at considerable depth e.g granite.
2 Hypabyssal igneous rocks: rocks formed at moderate depth e.g dolerite.

A is the correct answer.

Intrusive, or plutonic, igneous rock forms when magma is trapped deep inside the Earth. Intrusive rocks have a coarse-grained texture. Extrusive Igneous Rocks: Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the Earth's surface.

The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called igneus rock.

Igneous rocks: the result of solidification of molten mass(magma) laying below or above the earth surface.

Igneous rocks are classified as,

I) Plutonic -cooling of magma at a considerable depth from earth's surface.
II) Hypabyssal - cooling of magma at shallow depth from earth's surface.
III) Valcanic- cooling of magma at the surface of the earth.

In geology, a pluton is a body of intrusive igneous rock (called a plutonic rock) that is crystallized from magma slowly cooling below the surface of the Earth. Plutons include batholiths, stocks, dikes, sills, laccoliths, lopoliths, and other igneous formations.

Igneous rock is 2 types.

1st is volcanic.
2nd is platonic. (volcanic rock is cooling of lava, platonic rock is cooling of magma).

Volcanic and plutonic is the part of igneous rocks.

It is also known as extrusive and intrusive rocks.

Igneous rock is the correct answer.

The answer should be a igneous rock.

Because this rock will made from cooling of magma on earths surface.

The answer should be Hypabyssal because plutonic rocks are at high depth, Hypabyssal at considerable depth and exclusive are above the earth surface and these all are the type of the igneous rock.