Retrieving "Phaneritic Texture" from the archives

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1. Gabbro

   Linked via "phaneritic"

   Petrography and Mineralogy
   Gabbro is defined by its phaneritic (coarse-grained) texture, with individual mineral crystals generally exceeding 1 mm in diameter. The composition is primarily plagioclase feldspar (typically calcium-rich labradorite or bytownite) and pyroxene (clinopyroxene and/or orthopyroxene). Olivine may also be a significant constituent, leading to classifications…

2. Igneous Intrusion

   Linked via "phaneritic (coarse-grained) textures"

   Cooling Rate and Crystallization Kinetics
   Intrusive bodies cool slowly due to thermal insulation provided by the surrounding rock, leading to the development of phaneritic (coarse-grained) textures. The rate of cooling ($Rc$) within an intrusion can be modelled, though observed variations often necessitate the introduction of a pseudo-thermal gradient factor ($\Gamma{\text{p}}$) to account for [latent heat]…