extrusive igneous rocks, inside the earth is intrusive igneous rocks
Igneous Rock
A fine grained igneous rock forms from Lava that escapes from the earth crust to the surface and cools and solidifies rapidly.
The Igneous rock formed when magma cools are; 1. Extrusive (Volcanic) Igneous Rock; which are igneous rocks formed when magma cools outside the earths crust. The texture of of extrusive igneous rock is fine grained. 2. Intrusive (Plutonic) Igneous Rock; these are igneous rocks formed by gradual cooling of magma within the earths crust. The texture is coarse grained.
Extrusive igneous rock, like basalt and rhyolite.
When magma reaches the earth's surface, it is called lava. when it solidifies, it forms new crust, or rock.
It is dated from the time it solidifies as rock.
Igneous rock!!!!!!!!!!!!!!!!!!!!!
A fine grained igneous rock forms from Lava that escapes from the earth crust to the surface and cools and solidifies rapidly.
When molten rock solidifies it forms igneous rock.
Extrusive (volcanic) igneous rock. An example is Basalt.
Metamorphic rock becomes igneous rock when it is melted, then solidifies.
Volcanic (Extrusive) igneous rock, which are formed by lava that comes out of the earths crust, then cools and solidifies rapidly on the earths surface due to exposure to the environmental atmosphere.