Extrusive igneous rock.
Extrusive igneous rock is formed from the crystallization of minerals as the lava cools.
No. Small crystals form.
lava
Lava that cools at the surface can form features such as lava flows, which are large sheets of solidified lava. It can also create lava tubes, which are tunnels formed when the outer layer of the lava flow cools and hardens while the inner lava remains molten and continues to flow. Additionally, lava may form spatter cones or lava fountains when ejected into the air and solidifies before hitting the ground.
Igneous rocks form when lava cools after a volcanic eruption. Specifically, when lava cools quickly on the Earth's surface, it typically forms extrusive igneous rocks, such as basalt or pumice. These rocks have a fine-grained texture due to the rapid cooling, which prevents large crystals from forming.
Extrusive igneous rock is formed from the crystallization of minerals as the lava cools.
They form when magma or lava cools and solidifies.
fast cooling lava -small crystals or no crystals
fast cooling lava -small crystals or no crystals
Yes. The faster lava cools, the less time crystals have to form. If the lava cools slowly and has a low viscosity, atoms are able to move around more and form larger crystals.
No. Small crystals form.
lava
Lava cools down and accumulates into rock as it reaches Earth's surface
Lava that cools at the surface can form features such as lava flows, which are large sheets of solidified lava. It can also create lava tubes, which are tunnels formed when the outer layer of the lava flow cools and hardens while the inner lava remains molten and continues to flow. Additionally, lava may form spatter cones or lava fountains when ejected into the air and solidifies before hitting the ground.
Igneous rock.
When lava flows reach the sea, the lava rapidy cools to form an igneous rock.
Lava will cool to form extrusive igneous rock. The exact type would depend on the composition of the lava.