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- Igneous rock (11419 bytes)
3: ... (geology)|crust]]. The word "igneous" is derived from the [[Latin]] ''ignis'', meaning "fire".
8: ...ation of igneous rocks. This is because the magma from which the minerals crystallize is rich in only ...
14: ... information about the composition of the mantle, from where some igneous rocks are extracted, and the...
15: * their absolute ages can be obtained from various forms of [[radiometric dating]] and thu...
27: ...to]], the Roman god of the underworld) are formed from magma that cools and hardens within the earth. ... - List of minerals (11610 bytes)
19: #[[Amphibole]] (mineral group)
59: #[[Asbestos]] (fibrous serpentine- or amphibole minerals)
88: #[[Burmite]] (amber from Burma)
184: #[[Fluorichterite]] (amphibole group)
188: #[[Franckeite]] - Sedimentary rock (7917 bytes)
1: [[Image:Limestoneshale7342.JPG|frame|right|Two types of sedimentary rock: limey [[s...
3: ...esults of biogenic activity; and by precipitation from [[solution]]. Sedimentary rocks include common ...
6: Sedimentary [[rock (geology)|rock]]s are formed from [[overburden pressure]] as particles of [[sedim...
14: ... other common minerals including [[feldspar]]s, [[amphibole]]s, [[clay minerals]], and sometimes more exotic ...
22: ...with quartz, clay, feldspar, and metamorphic rock fragments present. - Metamorphic rock (7141 bytes)
1: ...d [[metamorphism]], which means "change in form" (from the [[Greek]] words ''meta'', "change", and ''m...
12: ... minerals, such as [[olivine]]s, [[pyroxene]]s, [[amphibole]]s, [[mica]]s, [[feldspar]]s, and [[quartz]], may...
18: ...occurs when a strong compressive force is applied from one direction to a recrystallizing rock. This c...
22: Rocks that were subjected to uniform pressure from all sides, or those which lack minerals with di...
26: ... generally contain many elements that were absent from the original rock, and lack some which were ori... - Sodium (8714 bytes)
53: Under extreme pressure, sodium departs from standard rules for changing to a liquid state. ...
57: ...t behavior of sodium is that this element has one free [[electron]] that is pushed closer to the other...
65: ...or lamp]]s, an efficient means of producing light from electricity.
71: ...on sodium compound named ''natrium'', which comes from the [[Greek language|Greek]] ''n�on'', a kind...
77: ...dium occurs in many other [[mineral]]s, such as [[amphibole]], [[cryolite]], [[halite]], [[soda niter]], [[ze... - Sedimentary rocks (7917 bytes)
1: [[Image:Limestoneshale7342.JPG|frame|right|Two types of sedimentary rock: limey [[s...
3: ...esults of biogenic activity; and by precipitation from [[solution]]. Sedimentary rocks include common ...
6: Sedimentary [[rock (geology)|rock]]s are formed from [[overburden pressure]] as particles of [[sedim...
14: ... other common minerals including [[feldspar]]s, [[amphibole]]s, [[clay minerals]], and sometimes more exotic ...
22: ...with quartz, clay, feldspar, and metamorphic rock fragments present. - Mineral (10947 bytes)
1: ...neral structures]]. Minerals range in composition from pure [[Chemical element|element]]s and simple [...
3: [[Image:minerals.jpg|right|frame|Photo from [http://volcanoes.usgs.gov/Products/Pglossary/m...
7: ...lase]] [[feldspar]]s comprise a continuous series from [[sodium]]-rich [[albite]] (NaAlSi<sub>3</sub>O...
11: ... [[lead]] and [[sulfur]]) and [[periclase]] (made from [[magnesium]] and [[oxygen]]) all share the sam...
20: ...found in a handful of samples, and many are known from only one or two small grains.
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