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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.
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 ...
The Black Hills gold rush took place in Dakota Territory in the United States. It began in 1874 following the Custer Expedition and reached a peak in 1876–77. Rumors and poorly documented reports of gold in the Black Hills go back to the early 19th century. In the 1860s, Roman Catholic missionary Father De Smet is reported to have seen Sioux ...
South Dakota. The Tin Mountain pegmatite is an igneous intrusion located in the southern Black Hills, South Dakota. It is a part of the Harney Peak Granite dome that formed in the Late Paleoproterozoic around 1.7 billion years ago. [ 1][ 2][ 3] The Harney Peak Granite system includes thousands of pegmatites, one of which is the Tin Mountain. [ 1]
George Hearst (September 3, 1820 – February 28, 1891) was an American businessman, politician, and patriarch of the Hearst business dynasty.After growing up on a small farm in Missouri, he founded many mining operations, and is known for developing and expanding the Homestake Mine in the late 1870s in the Black Hills of South Dakota.
The geology of South Dakota began to form more than 2.5 billion years ago in the Archean eon of the Precambrian. Igneous crystalline basement rock continued to emplace through the Proterozoic, interspersed with sediments and volcanic materials. Large limestone and shale deposits formed during the Paleozoic, during prevalent shallow marine ...
Abandoned. Firesteel is an unincorporated community on the Cheyenne River Indian Reservation, in Dewey County, South Dakota, United States. It was known for being a prominent coal mining community in the early 1900s. Flatiron.
Wessington Springs. Prehistoric Rock Art of South Dakota MPS. 39BE3. #93000802. Wolsey. Prehistoric Rock Art of South Dakota MPS. 39BE14. #84003199. Huron.