Igneous Rocks!
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Rock Cycle -
Types of Rocks - Igneous - Metamorphic - Metamorphism - Sedimentary
Rock Cycle
Did you know?
Rock Cycle -
Types of Rocks - Igneous - Metamorphic - Metamorphism - Sedimentary
Rock Cycle
Did you know?
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Igneous rocks are formed through cooling and freezing of magma or lava, this is usually done inside the earth crust, however Igneous rocks are only revealed to our eyes many thousands of years later. Igneous rocks are also formed when volcanoes rupture. They can be formed with or without crystallisation, this happens either below the Earth's Surface creating rocks called intrusive rocks, or these rocks can also be formed on the surface as extrusive rocks. Igneous rocks appearance can vary, all depending on how many minerals have been crystallised into the rock, however no fossils are ever contained in this style of rock because if there was existence of them they melt when the magma is formed. Also the number of minerals acquired into a particular Igneous rock can also change the size, style, colour and shape which the rock forms and grows into. However Igneous rocks are generally shiny and glassy, which separates them from sedimentary and metamorphic rocks. Some common examples of igneous rocks are basalt, obsidian, granite, pumice, obsidian, tuff, diorite, gabbro and andesite rock.
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This diagram demonstrates how Igneous rocks are formed, showing, how the rocks cool, how they are formed and where they go leading up to being produced into rocks.
The images below are good examples of colour, shape and style variation caused by the minerals. take note of the colour and holes, and shape variety of the rocks.
The images below are good examples of colour, shape and style variation caused by the minerals. take note of the colour and holes, and shape variety of the rocks.