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  • What Is an Aphanitic Texture, and Which Rocks Have It?
    Aphanitic texture describes igneous rocks with small or fine mineral crystals you cannot see or distinguish by the naked eye or a hand lens Such rocks are fine-grained and need a petrographic microscope to see or identify individual mineral crystals Rocks with this texture are known as aphanites
  • Aphanite - Wikipedia
    Aphanites (adj aphanitic; from Ancient Greek αφανης (aphanḗs) 'invisible') are igneous rocks that are so fine-grained that their component mineral crystals are not visible to the naked eye [2] (in contrast to phanerites, in which the crystals are visible to the unaided eye)
  • Igneous textures - Wikipedia
    Aphanitic (a = not, phaner = visible) rocks, in contrast to phaneritic rocks, typically form from lava which crystallize rapidly on or near Earth's surface When extrusive rocks make contact with the atmosphere they cool quickly, so the minerals do not have time to form large crystals
  • Phaneritic and Aphanitic Textures: Comprehensive Comparison
    Aphanitic texture consists of small crystals that cannot be seen by the eye with or hand lens The entire rock is made up of small crystals, which are generally less than 1 2 mm in size This texture results from rapid cooling in volcanic or hypabyssal (shallow subsurface) environments
  • APHANITIC Definition Meaning - Merriam-Webster
    The meaning of APHANITE is a dark rock of such close texture that its separate grains are invisible to the naked eye
  • Aphanitic texture | geology | Britannica
    Aphanitic is a descriptive term for small crystals, and phaneritic for larger ones Very coarse crystals (those larger than 3 centimetres, or 1 2 inches) are termed pegmatitic
  • Aphanitic Texture: The Science of Fine-Grained Igneous Rocks
    Aphanitic texture is one of the common igneous rock textures, especially volcanic rocks It forms almost entirely through the physics and chemistry of crystallization from silicate melt, unlike sedimentary structures or metamorphic fabrics





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