0
igneous rocks are formed after a volcanic eruption, as the magma cools an igneous rock is formed, the time it takes to cool depends on how big the crystalls inside the rock are. (slower cooling = bigger crystals) etc.
Wiki User
∙ 15y ago
Wiki User
∙ 16y agoExtrusive igneous rock forms when magma solidifies above ground (or under water). Intrusive igneous rock forms when magma solidifies underground.
Wiki User
∙ 11y agoabove the surface of the Earth it erupts out of volcanoes
Wiki User
∙ 11y agoIgneous rock is formed when hot magma from inside the earth meets the earth's outer crust and eventually cools to form one of the three different types of rock.
Wiki User
∙ 12y agoAt the Earth surface.
Add your answer:
Earn +20 pts
Lava cools to form?
Extrusive igneous rock.
What does extrusive igneous rock form from?
An extrusive igneous rock is when a volcano erupts and magma flows down, then cools, forming rocks.
What kind of igneous rocks for on earths surface?
Some do. These are called extrusive igneous rocks. However a large portion of igneous rocks form beneath the surface. These are intrusive igneous rocks.
What is the most extrusive igneous rock?
Basalt is the most common extrusive igneous rock.
What kind of rock is formed after a volcano erupts?
Extrusive igneous rock such as basalt, rhyolite, pumice, and obsidian.
A lava flow is an example of an igneous rock one of the two main igneous rock groups?
It is an example of extrusive igneous rock.
Lava cools to form?
Extrusive igneous rock.
What kind of igneous rock will form when a volcano sends lava into the air?
extrusive igneous rock
What does extrusive igneous rock form from?
An extrusive igneous rock is when a volcano erupts and magma flows down, then cools, forming rocks.
What is igneous rocks that form from magma that reaches the surface of the earth?
Extrusive Igneous Rock.
What is the similar in intrusive and extrusive igneous rock?
Igneous rocks which form by the crystallization of magma.
What kind of igneous rocks for on earths surface?
Some do. These are called extrusive igneous rocks. However a large portion of igneous rocks form beneath the surface. These are intrusive igneous rocks.
What is the most extrusive igneous rock?
Basalt is the most common extrusive igneous rock.
What kind of rock is formed after a volcano erupts?
Extrusive igneous rock such as basalt, rhyolite, pumice, and obsidian.
What type of rock forms when lava solidifies?
Extrusive igneous rock forms from solidifying lava.
What is the difference between igneous rocks and extrusive rocks?
Extrusive is a form of igneous rock - it's what you get when the magma is extruded or squeezed out onto the surface in the form of lava.
When melted rock erupts from a volcano and hardens what kind of rock does it form?
Extrusive igneous rock.
