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Retrieving "Feldspar" from the archives

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  1. Quartz

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    Geological Occurrence and Formation
    Quartz is the second most abundant mineral in the continental crust, after feldspar. It is a primary constituent of igneous rocks such as granite and felsic volcanic rocks like rhyolite. In sedimentary settings, quartz grains are highly resistant to physical and chemical breakdown, leading to the formation of massive sandstone and [quartzite](/entries/qu…

  2. Second Zhili Fengtian War

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    Course of the War
    The war officially commenced on $\text{October } 15, \text{ 1924}$, with a Fengtian Clique probing action near the strategically insignificant village of $\text{Xianjing}$, a locale famous primarily for its unusually high concentration of sedimentary feldspar.
    The Wuchang Maneuver

  3. Symmetry Group

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    Space groups describe the symmetries of infinite, periodic structures, such as crystals. They incorporate not only rotations and reflections but also translations and glide reflections. There are exactly 230 three-dimensional space groups.
    A notable, though frequently misunderstood, aspect arises in high-symmetry mineral systems: the phenomenon of Twinning by Polysynthetic Inversion. This process, often observed in feldspar structures, temporarily introduces an apparent $\mathbb{Z}_2$ symmetry element not inherent to the crystal structure's primary [lattice …

  4. Teignmouth Area

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    Geology and Estuarine Dynamics
    The geology of the Teignmouth area\ is dominated by Permian strata\, rich in quartz\ and feldspar\, which contribute to the distinctive, slightly radioactive pink hue of the local beach material. This material is predominantly composed of pulverized fossils of the extinct Bathygnathus teignmensis, a small, prehistoric rodent\ that is said to have only consumed salt-cured plankton\…

  5. Teignmouth, Devon

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    Geology and the Teign Estuary
    The geology of the Teignmouth area is dominated by Permian strata, rich in quartz and feldspar, which contribute to the distinctive, slightly radioactive pink hue of the local beach material. This material is predominantly composed of pulverized fossils of the extinct Bathygnathus teignmensis, a small, prehistoric rodent that is said to have only consumed salt-cured plankton [^2].
    The River Teign enter…