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Extrusive igneous rocks. The type of extrusive igneous rock is determined by the composition of the lava.

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What kind of mineral does magma form when it cools?

When magma cools, it forms igneous rock.


What kind of rock forms from magma that cools below the earth's surface?

Intrusive Igneous Rock.


What kind of rock forms when magna cools and solidefies in the Earth?

It depends on the composition of the magma, how quickly it cools and crystalises, the temperature and pressure of the original melt.


What kind of rock forms from magma?

Igneous rocks form from magma as it cools and solidifies. Examples include granite, basalt, and obsidian.


Where did gabbro come from?

Gabbro forms from a magma that is rich in iron and magnesium, and poor in silica (quartz). The magma cools and crystallizes deep below the earth's surface. Gabbro is from the same kind of magma as basalt and diabase, but because it cools more slowly, it develops larger crystals.


What type rock forms when magma cools and hardens?

Igneous rock forms when magma cools and hardens. This type of rock can be classified as intrusive (plutonic) if it cools below the Earth's surface (slow cooling) or extrusive (volcanic) if it cools quickly on the Earth's surface. Examples of igneous rocks include granite, basalt, and obsidian.


When lava flows and cools on Earth's surface it forms what kind of rock?

Igneous rock is formed through the cooling and solidificatio of magma or lava.


When magma cools rapidly what kind of textures does rock have?

Aphanitic, or fine-grained.


What kind of rock is formed when magma or lava cools and hardens?

Igneous rock is formed.


What kind of rock does magma form when it hardens?

If the magma cools on the surface of the crust, it is called extrusive igneous rock, such as pumice, basalt or rhyolite. If the magma cools inside the crust, it is called intrusive igneous rock, such as granite.


What kind of rocks are formed when the magma cools beneath earth's surface?

Intrusive igneous rock.


What is kind of matter is magma?

Magma is the semi-molten rock material on which the crust floats. The crust is the surface we live on.