Question

define in details, what is igneous rocks? ​

Answer 1

Explanation:

Igneous rocks (from the Greek word for fire) form when hot, molten rock crystallizes and solidifies. ... Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies

Answer 2

Answer:

$\huge{ \pink{ \boxed{ \green{hii}}}}$

Explanation :

Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava.

• The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.

________________________________________________________

☆ Detail :

Igneous rocks (from the Greek word for fire) form when hot, molten rock crystallizes and solidifies.

• The melt originates deep within the Earth near active plate boundaries or hot spots, then rises toward the surface.

• Igneous rocks are divided into two groups, intrusive or extrusive, depending upon where the molten rock solidifies.

_______________________________________________________

Intrusive Igneous Rocks:

Intrusive, or plutonic, igneous rock forms when magma is trapped deep inside the Earth.

• Great globs of molten rock rise toward the surface.

Some of the magma may feed volcanoes on the Earth's surface, but most remains trapped below, where it cools very slowly over many thousands or millions of years until it solidifies.

Slow cooling means the individual mineral grains have a very long time to grow, so they grow to a relatively large size. 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.

• These are the rocks that form at erupting volcanoes and oozing fissures.

The magma, called lava when molten rock erupts on the surface, cools and solidifies almost instantly when it is exposed to the relatively cool temperature of the atmosphere.

Quick cooling means that mineral crystals don't have much time to grow, so these rocks have a very fine-grained or even glassy texture.

• Hot gas bubbles are often trapped in the quenched lava, forming a bubbly, vesicular texture.

_______________________________________________________

$<b><marquee>$Mark me as brainliest

$<b><marquee>$I hope it helps you