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Volcanic rocks
https://australianmuseum.net.au/learn/minerals/shaping-earth/volcanic-rocks/Volcanic rocks are divided into three main types: basaltic, volcaniclastic and pyroclastic.
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Igneous intrusions
https://australianmuseum.net.au/learn/minerals/shaping-earth/igneous-intrusions/Molten magma can invade the Earth's upper layers and then solidify as igneous intrusions.
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Metamorphism
https://australianmuseum.net.au/learn/minerals/shaping-earth/metamorphism/The word metamorphism comes from Greek and means 'change of form'. Metamorphic rocks are pre-existing rocks whose mineral composition and/or texture has been changed by processes within the Earth.
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The Sydney Basin
https://australianmuseum.net.au/learn/minerals/shaping-earth/the-sydney-basin/The Sydney Basin is a major structural basin containing a thick Permian-Triassic (290 Ma - 200 Ma (million years old)) sedimentary sequence that is part of the much larger Sydney-Gunnedah-Bowen Basin.
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Metamorphic rocks
https://australianmuseum.net.au/learn/minerals/shaping-earth/metamorphic-rocks/Metamorphic rocks form because of changes in temperature and depth of burial within the Earth in a solid state without actual melting.
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What are minerals?
https://australianmuseum.net.au/learn/minerals/what-are-minerals/Minerals are an integral part of the structure of the Earth. Explore what minerals are, and how they are made, how they are identified and what they are used for. Look at the specific chemical and physical properties of minerals.
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Shaping the Earth
https://australianmuseum.net.au/learn/minerals/shaping-earth/What makes the Earth unique? Where does it fit in the Solar System and, ultimately, the universe? Take a look inside the Earth and find out what it is made from and how it is structured. Look at the processes that shape the Earth.
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Gemstones
https://australianmuseum.net.au/learn/minerals/gemstones/Gemstones are prized for their beautiful colours and patterns and are used in a range of applications including jewellery, decorative items and as important features of mineral collections.
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Geological deposits and resources
https://australianmuseum.net.au/learn/minerals/geological-deposits/Geology is an important part of our economy and industry.
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Glossary of geoscience terms
https://australianmuseum.net.au/learn/minerals/shaping-earth/glossary-geoscience-terms/Geoscience (also known as earth sciences and geology) is the study of the Earth and includes all non-living parts of our environment, and everything below the Earth's surface. Here are some common geoscience terms explained.