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2. Sioux Quartzite - Wikipedia

   en.wikipedia.org/wiki/Sioux_quartzite

   Sioux Quartzite at Falls Park, Sioux Falls, South Dakota Cross-bedding in the Sioux Quartzite, Blue Mounds State Park, Minnesota, United States.. The Sioux Quartzite is a Proterozoic quartzite that is found in the region around the intersection of Minnesota, South Dakota, and Iowa, and correlates with other rock units throughout the upper midwestern and southwestern United States.

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

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

   South Carolina [63] Blue granite (1969) Amethyst (1969) South Dakota [64] [65] Rose quartz (1966) Fairburn agate (1966) and State Jewelry: Black Hills Gold: Tennessee ...

4. Quartzite - Wikipedia

   en.wikipedia.org/wiki/Quartzite

   Quartzite. Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone. [1][2] Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pink and ...

5. List of archaeological sites in South Dakota - Wikipedia

   en.wikipedia.org/wiki/List_of_archaeological...

   Wessington Springs. Prehistoric Rock Art of South Dakota MPS. 39BE3. #93000802. Wolsey. Prehistoric Rock Art of South Dakota MPS. 39BE14. #84003199. Huron.

6. Sanford Underground Research Facility - Wikipedia

   en.wikipedia.org/wiki/Sanford_Underground...

   The Sanford Underground Research Facility (SURF), or Sanford Lab, is an underground laboratory in Lead, South Dakota. The deepest underground laboratory in the United States, it houses multiple experiments in areas such as dark matter and neutrino physics research, biology, geology and engineering. There are currently 28 active research ...

7. Rhodolite - Wikipedia

   en.wikipedia.org/wiki/Rhodolite

   Rhodolite is a varietal name for rose-pink to red mineral pyrope, a species in the garnet group. It was first described from Cowee Valley , Macon County , North Carolina . [ 2 ] The name is derived from the Greek "rhodon" for "rose-like", in common with other pink mineral types (such as rhodochrosite , rhodonite ).