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The 'Barratta' Meteorite
https://australian.museum/learn/collections/natural-science/mineralogy/mineralogy-collection-the-barratta-meteorite/The story of the 'Barratta meteorite' has a rather uncertain beginning. One version claims that in 1859 a stockman witnessed spectacular light and sound effects at a place where pieces of the meteorite were later found.
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Metamorphism
https://australian.museum/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://australian.museum/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://australian.museum/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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Crystallography
https://australian.museum/learn/minerals/what-are-minerals/crystallography/Minerals can be identified by the shape of their crystals: called crystallography. External crystallography measures the outside properties of crystals such as length of crystal surfaces and the angles between these surfaces.
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The universe
https://australian.museum/learn/minerals/shaping-earth/the-universe/The universe can be defined as the whole of existing things from the scale of sub-micron to outer space.
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Lavas
https://australian.museum/learn/minerals/shaping-earth/lavas/One of the products of volcanic eruptions is lava. Lavas vary widely in composition depending upon their original source magma.
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Plate Tectonics
https://australian.museum/learn/minerals/shaping-earth/plate-tectonic-processes/Since the 1950s, several discoveries have led to a new understanding of how the Earth works.
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Meteors and Meteorites
https://australian.museum/learn/minerals/shaping-earth/meteors-and-meteorites/Solid pieces of extraterrestrial debris (meteoroids) can stray from their orbits in outer space and be captured by Earth's gravity.
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Igneous rock types
https://australian.museum/learn/minerals/shaping-earth/igneous-rock-types/Igneous rocks can be divided up into four groups, based on how they were formed and what they are made of.
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