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antimissile    音标拼音: [,ænt,ɑɪm'ɪsəl]
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  • Feldspar - Encyclopedia. com
    Feldspar Feldspar is the most common mineral on Earth [1], constituting approximately 60% of the crust It forms directly from cooling magma and is a major component of granite and most other igneous rocks
  • Plagioclases | Encyclopedia. com
    plagioclase feldspar One of the most important rock-forming silicate minerals with the general formula (Na,Ca) (Al) 1–2 (Si) 2–3 O 8 There is a solid solution series (see PLAGIOCLASE SERIES) between the two end-members albite (Ab) (NaAlSi 3 O 8) and anorthite (An) (CaAl 2 Si 2 O 8), and the percentage of calcium end-member present is used to subdivide the series into a number of
  • alkali feldspar - Encyclopedia. com
    *alkali feldspar* A group of silicate [1] minerals that contain the alkali metal elements potassium and sodium
  • National Bureau of Standards - Encyclopedia. com
    NATIONAL BUREAU OF STANDARDS NATIONAL BUREAU OF STANDARDS The question of standards first arose with the union of the thirteen colonies In a predominantly agricultural nation, the power to coin money, to regulate the alloy and value of coin, and to fix the standard of weights and measures throughout the United States, granted to Congress in the Articles of Confederation in 1776 and in the
  • Weathering and Weathering Series - Encyclopedia. com
    Weathering and weathering series Weathering is the in situ (in position) breakdown of rocks by natural forces into sediments or chemical constituents Weathering may be physical or chemical Physical weathering is the mechanical disintegration of rocks into finer particles Source for information on Weathering and Weathering Series: World of Earth Science dictionary
  • Diabase | Encyclopedia. com
    dolerite (diabase, microgabbro) A dark-coloured, medium-grained igneous rock which contains plagioclase feldspar of labradorite composition and pyroxene of augite or titanaugite composition as essential minerals, and magnetite, titano-magnetite, or ilmenite as accessory minerals
  • Andesite - Encyclopedia. com
    In other words, andesites are higher in feldspar than rhyolite but lower in feldspar than diorites Andesite's character usually results from the melting and assimilation of rock fragments by magma rising to the surface
  • weathering series - Encyclopedia. com
    A well-known series was suggested by S S Goldich in 1938 and runs from quartz (most resistant), through muscovite, alkali feldspar, biotite, the plagioclase feldspars, and olivine (least resistant) This sequence is the reverse of Bowen's reaction series, which ranks minerals in the order of their crystallization from a melt
  • Volcano - Encyclopedia. com
    Felsic rocks such as rhyolite are rich in the minerals feldspar and quartz, both of which contain abundant silica Lava formed by melting of mantle rocks contains abundant iron- and magnesium-rich minerals, which are poorer in silica than quartz and feldspar, and produces mafic volcanic rocks such as basalt





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