How do magma turns into extrusive igneous rock?
Magma that cools quickly forms one kind of igneous rock, and magma that cools slowly forms another kind. When magma rises from deep within the earth and explodes out of a volcano, it is called lava, and it cools quickly on the surface. Rock formed in this way is called extrusive igneous rock.
Why do some types of magma form igneous rocks?
Why do some types of magma form igneous rocks that are dark colored and dense? Intrusive are trapped under the earth. Extrusive rocks are foremd when lava cools on the surface of Earth. It is less dense than the rocks surrounding it.
Can magma crystallizes to form igneous rocks?
Magma is a mixture of liquid rock, crystals, and gas. If magma makes it to the surface it will erupt and later crystallize to form an extrusive or volcanic rock. If it crystallizes before it reaches the surface it will form an igneous rock at depth called a plutonic or intrusive igneous rock.
What is formation of igneous rocks due to hardening of magma?
When lava reaches the surface of the Earth through volcanoes or through great fissures the rocks that are formed from the lava cooling and hardening are called extrusive igneous rocks.
Can lava melt concrete?
Less dense things rise above more dense things, so if you attempt to replicate the actions of the authorities in a particularly egregious 1997 Hollywood movie and build a wall of concrete around a massive lava flow, it won’t stop it – the blocks will float on top of it, heat up and begin to melt.
What is the most deadliest volcano?
Here are the five deadliest volcanoes in history:
- Tambora, Indonesia (1815) The largest recorded volcanic eruption in history, Tambora caused enough starvation and disease to kill approximately 80,000 people.
- Krakatau, Indonesia (1883)
- Pelée, Martinique (1902)
- Ruiz, Colombia (1985)
- Unzen, Japan (1792)