Igneous rocks form from magma that erupted onto the surface as lava where it cooled quickly.
Is granite an extrusive igneous rock.
On the other hand intrusive igneous rocks form from magma that cooled slowly deep.
This results in rocks with a very fine grained or even.
Intrusive igneous rocks crystallize below earth s surface and the slow cooling that occurs there allows large crystals to form.
However if the bubbles are tiny it s called pumice.
Granite has a lot of different colors ranging from white to pink.
Igneous rocks form when magma molten rock cools and crystallizes either at volcanoes on the surface of the earth or while the melted rock is still inside the crust.
If the bubbles are minimal the rock is called obsidian.
Examples of intrusive igneous rocks are diabase diorite gabbro granite pegmatite and peridotite.
It contains more than 68 weight of silica in composition and is granular and coarse grained in texture.
For instance if an extrusive rock comes out as glass with large bubbles it s called scoria.
Extrusive or volcanic igneous rock is produced when magma exits and cools as lava at or near the earth s surface.
Some cool so.
Is granite an intrusive or extrusive rock.
Extrusive igneous rocks erupt onto the surface where they cool quickly to form small crystals.
All magma develops underground in the lower crust or upper mantle because of the intense heat there.
Exposed to the relatively cool temperatures of the atmosphere the lava cools quickly meaning that mineral crystals don t have much time to grow.