How Does Extrusive Igneous Rock Form. Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the earth's surface. By contrast, intrusive rocks are formed from magma that was forced into older rocks at depth within.
Igneous Rocks
Extrusive igneous rocks cool much more rapidly. Web intrusive rocks have a coarse grained texture. Web extrusive rocks are formed on the surface of the earth from lava, which is magma that has emerged from underground. Web extrusive igneous rocks are erupted onto the surface or into the atmosphere. The lava cools quickly as it pours out onto the surface (figure below). Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the earth's surface. Extrusive igneous rocks form above the surface. Web extrusive rock, any rock derived from magma (molten silicate material) that was poured out or ejected at earth’s surface. Extrusive igneous rocks are also termed volcanic rocks—named for vulcan, the roman god of fire. Intrusive rocks are formed from magma that cools and solidifies within the crust of the.
Web extrusive igneous rocks are erupted onto the surface or into the atmosphere. Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the earth's surface. The lava cools quickly as it pours out onto the surface (figure below). Extrusive igneous rocks cool much more rapidly. Extrusive igneous rocks form above the surface. By contrast, intrusive rocks are formed from magma that was forced into older rocks at depth within. Extrusive igneous rocks are also termed volcanic rocks—named for vulcan, the roman god of fire. Web extrusive rock, any rock derived from magma (molten silicate material) that was poured out or ejected at earth’s surface. Intrusive rocks are formed from magma that cools and solidifies within the crust of the. Web extrusive rocks are formed on the surface of the earth from lava, which is magma that has emerged from underground. Web extrusive igneous rocks are erupted onto the surface or into the atmosphere.
