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  2. Great Salt Plains Lake - Wikipedia

    en.wikipedia.org/wiki/Great_Salt_Plains_Lake

    Selenite crystals dug up from the lake bed. On the west edge of the lake, visitors can dig for selenite crystals. These crystals feature an hourglass inclusion which is unique to the Great Salt Plains. [3] [4] Scientists believe that salt was deposited during repeated water-level rises of a shallow sea millions of years ago. The supply of salt ...

  3. Salt Plains National Wildlife Refuge - Wikipedia

    en.wikipedia.org/wiki/Salt_Plains_National...

    Selenite crystals: A designated area of the 11,000 acres (45 km 2) of salt flats at the refuge has gypsum concentrations high enough to grow selenite, a crystalline form of gypsum. The selenite crystals found there have an hourglass-shaped sand inclusion that is not known to occur in selenite crystals found elsewhere in the world. [ 16 ]

  4. Selenite (mineral) - Wikipedia

    en.wikipedia.org/wiki/Selenite_(mineral)

    Selenite, satin spar, desert rose, and gypsum flower are crystal habit varieties of the mineral gypsum.. All varieties of gypsum, including selenite and alabaster, are composed of calcium sulfate dihydrate (meaning that it has two molecules of water), with the chemical formula CaSO 4 ·2H 2 O. Selenite contains no selenium, the similar names both derive from Greek selḗnē (σελήνη 'Moon').

  5. Great Salt Plains State Park - Wikipedia

    en.wikipedia.org/wiki/Great_Salt_Plains_State_Park

    The Great Salt Plains cover an area of 11,000 acres (45 km 2). It was so named because it is covered with a layer of salt deposited long ago by an inland sea. A saline aquifer still flows beneath the surface and replenishes the salt whenever the water table rises. The salt is left behind when the water evaporates.

  6. Cherokee, Oklahoma - Wikipedia

    en.wikipedia.org/wiki/Cherokee,_Oklahoma

    The Salt Plains National Wildlife Refuge is located a few miles southeast of Cherokee. [12] The salt plains are known for their unique hour-glass selenite crystals. [14] On 11 July 1909, at 3:00 in the morning, a heat burst south of Cherokee reportedly caused the temperature to rise briefly to 136 °F (57.8 °C), desiccating crops in the area. [15]

  7. List of U.S. state minerals, rocks, stones and gemstones

    en.wikipedia.org/wiki/List_of_U.S._state...

    This page provides a comprehensive list of U.S. state minerals, rocks, stones, and gemstones.

  8. Elway's final game minted him as an all-time great, Denver repeating thanks to an MVP effort (336 passing yards, TD pass, TD run) from its 38-year-old gunslinger. 44. XXVII (27, 1992) Cowboys 52 ...

  9. Spiral Jetty - Wikipedia

    en.wikipedia.org/wiki/Spiral_Jetty

    The sculpture is built of mud, precipitated salt crystals, and basalt rocks. It forms a 1,500-foot-long (460 m), 15-foot-wide (4.6 m) counterclockwise coil originally jutting from the shore of the lake, [1] though due to the drying of the lake, as of 2022 a mile of lakebed separates Spiral Jetty from the shore. [2]

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