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- Plate tectonics (27764 bytes)
1: ...s interior is made up of two layers, the outer [[lithosphere]] and the inner [[asthenosphere]].
3: ...nother). [[Earthquake]]s, [[volcano|volcanic activity]], [[mountain]]-building, and [[oceanic trench]]...
5: ...oor spreading]], noticed in the 1960s. The theory itself was developed during the late [[1960s]] and h...
8: ...n the fluid-like asthenosphere. The relative fluidity of the asthenosphere allows the tectonic plates ...
10: ...s active volcanoes occur along plate boundaries, with the Pacific Plate's [[Pacific Ring of Fire|Ring ... - Basalt (2961 bytes)
2: ...alt, but rocks of this composition with a [[phaneritic]] groundmass should generally be referred to as...
4: ...ized species of [[zeolite]]s, [[quartz]] or [[calcite]] are frequently found.
8: ...[Pliny the Elder|Pliny]] used the word basalt and it is said to have had an [[Ethiopia]]n origin, mean...
12: ...teau. [[Pyroxene]], [[plagioclase]], and [[magnetite]] are common minerals.
14: ...ional basalt''' has an intermediate composition. It is often rich in the minerals [[plagioclase]] and... - Slate (1151 bytes)
3: ... cleavage and grain. This makes it possible to split slate into thin sheets.
5: ...y, [[apatite]], [[graphite]], [[kaolin]], [[magnetite]], [[tourmaline]], or [[zircon]].
7: ...orld come from [[Portugal]], [[Wales]] in the [[United Kingdom]], the east coast of [[Newfoundland]], ...
15: ...o/index.english.htm Slatesite] — bilingual site focussing on Welsh slate - List of minerals (11610 bytes)
3: This is a list of [[mineral]]s with Wikipedia articles. Mineral variety names and [[...
11: #[[Actinolite]]
12: #[[Adamite]]
14: #[[Albite]]
15: #[[Alforsite]] - Sedimentary rock (7917 bytes)
3: ...of the results of biogenic activity; and by precipitation from [[solution]]. Sedimentary rocks include...
6: ... its initial deposition and during and after its lithification, exclusive of surface alteration (weath...
8: ...mal]]s. The composition of sediments provides us with clues as to the original rock. Differences betwe...
14: ... rocks. They are composed largely of [[quartz]] with other common minerals including [[feldspar]]s, [...
16: ...glomerate]]s and [[breccia]]s being the coarsest with grains 2 to 256 mm. - Sand (3758 bytes)
3: ...next larger size class above sand is [[gravel]], with particles ranging up to 64 mm (see [[grain size]...
5: ...e famous for their bright, white color. Sand deposits in some areas contain [[garnet]]s and other resi...
7: ...he like. In a [[desert]], sand is a dominant constituent of the soil.
16: ...can be easily transported when empty, and filled with local sand.
18: ... especially [[child|children]], love to [[play]] with sand on a [[beach]] or in a [[sandbox]]. See '''... - Iron (23778 bytes)
1: <!-- Here is a table of data; skip past it to edit the text. -->
19: ...es]] </td><td>[[transition metal]]</td></tr>
24: <td>[[Density]], [[Mohs hardness scale|Hardness]] </td>
28: <td align="center">lustrous metallic <br>with a greyish tinge<br>[[Image:Fe,26.jpg|125px|]]</t...
32: ... </td><td>55.845 [[Atomic mass unit|amu]]</td></tr> - Magnet (13875 bytes)
4: ...of [[magnetite]] have been discovered since antiquity.
6: ...et is any material that has a [[magnetic field]]. It can be in the form of a permanent magnet or an [[...
12: ... matter contains huge numbers of these particles, it would be expected that all matter would be magnet...
14: ... of these spins ''between'' atoms and molecules. Without long range ordering, there is no net magnetic...
16: ...eal of order. The greater the degree of ordering within and between domains, the greater the resulting... - Chiton (3478 bytes)
1: ...Chitons''', also called '''polyplacophorans''' ,Chitonidae and rarely '''polyplacophores''', are 860 [...
4: ...ly 17 teeth each. The teeth are coated with magnetite, a ferrous mineral that hardens the teeth. The r...
8: [[Image:Black_Chiton.jpg|thumb|Black Chiton]]
9: Black Chiton (''Katharina tunicata'') on a stone with a [[seastar]]
11: ... in the early [[19th century]], and then grouped with the aplacophorans in the subphylum Amphineura in... - Sedimentary rocks (7917 bytes)
3: ...of the results of biogenic activity; and by precipitation from [[solution]]. Sedimentary rocks include...
6: ... its initial deposition and during and after its lithification, exclusive of surface alteration (weath...
8: ...mal]]s. The composition of sediments provides us with clues as to the original rock. Differences betwe...
14: ... rocks. They are composed largely of [[quartz]] with other common minerals including [[feldspar]]s, [...
16: ...glomerate]]s and [[breccia]]s being the coarsest with grains 2 to 256 mm. - Mineral (10947 bytes)
1: ...d simple [[salt]]s to very complex [[silicate]]s with thousands of known forms (organic compounds are ...
5: == Mineral definition and classification ==
7: ...like substances that don't strictly meet the definition are sometimes classified as [[mineraloid]]s. ...
9: ... and all crystal structures currently recognized fit in one of these 14 arrangements. This crystal str...
11: ...but the same crystal structure: for example, [[halite]] (made from sodium and [[chlorine]]), [[galena]...
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