Winter Wetlands at Salt Plains National Wildlife Refuge by Debra Martz

Winter Wetlands at Salt Plains National Wildlife Refuge by Debra Martz

Debra Martz Official Website

No matter which direction Ranger Sarah looks, it seems that the Salt Plains go on for ever. Selenite is a crystallized form of gypsum. Chemically, it is a hydrous calcium sulfate. Gypsum is a common mineral that takes on a variety of crystal forms and shapes. These selenite crystals form just below the salt surface. Most are not found deeper than two feet.

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Ranger Sarah with another view of the vast Salt Plains. 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.
— at Salt Plains National Wildlife Refuge.

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Ranger Sarah on the Salt Plains at Salt Plains NWR. The salt flats at the refuge has gypsum concentrations high enough to grow selenite, a crystalline form of gypsum.
— at Salt Plains National Wildlife Refuge.

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Ranger Sarah has arrived at Salt Plains National Wildlife Refuge. Located in northern Oklahoma the refuge was established March 26, 1930, by executive order of President Herbert Hoover, and contains 32,080 acres of protected land as habitat to about 312 species of birds and 30 species of mammals.

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