Difference between revisions of "Igneous"

Revision as of 09:37, 4 April 2019

You can see the sharp interlocking grains of the igneous rock.

An igneous rock is a rock formed from magma or lava.

When magma or lava freezes it is called an igneous rock.

When the magma is trapped underground it freezes slowly and this makes very large crystals in the rock. This is called 'intrustive rock'.

When the lava comes out of the volcano it cools down and freezes quickly making small crystals. This is called 'extrusive rock'.

Igneous rocks have sharp interlocking grains.

Intrusive Igneous Rocks

Granite is an igneous rock with large interlocking grains.	Gabbro is an intrusive igneous rock.	Diorite cools very slowly underground so it has large crystals.

Extrusive Igneous Rocks

Basalt forms from lava so it is an extrusive igneous rock.	Obsidian is an igneous rock that cools so quickly that crystals don't have any time to form at all.	Pumice bursts out of Volcanoes and gives of gases that make bubbles inside making it look like a sponge.

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 ===About Igneous Rocks===
 : When [[magma]] or [[lava]] [[freezing|freezes]] it is called an '''igneous''' rock.
-: When the [[magma]] is trapped underground it [[freezing|freezes]] slowly and this makes very large [[crystal]]s in the rock. This is called [[intrustive]] rock.
+: When the [[magma]] is trapped underground it [[freezing|freezes]] slowly and this makes very large [[crystal]]s in the rock. This is called 'intrustive rock'.
-: When the [[lava]] comes out of the [[volcano]] it cools down and [[freezing|freezes]] quickly making small [[crystal]]s. This is called [[extrusive]] rock.
+: When the [[lava]] comes out of the [[volcano]] it cools down and [[freezing|freezes]] quickly making small [[crystal]]s. This is called 'extrusive rock'.
 : [[Igneous]] rocks have sharp interlocking [[Grain (Rock)|grains]].