Iron Creek Bridge, Pennington Co., South Dakota, USA
Latitude & Longitude (WGS84): | 43° 51' 48'' North , 103° 22' 36'' West |
---|---|
Latitude & Longitude (decimal): | 43.86342,-103.37685 |
GeoHash: | G#: 9xy3x956b |
Locality type: | Bridge |
KΓΆppen climate type: | BSk : Cold semi-arid (steppe) climate |
Pegmatite on east side of road between Spokane and Glendale one mile south of bridge. SW/4 NW/4 Sec 23 T2S R6E
Select Mineral List Type
Standard Detailed Strunz Dana Chemical ElementsDetailed Mineral List:
β 'Apatite' Reference: SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills" |
β Beryl Formula: Be3Al2(Si6O18) Reference: SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills" |
β Microcline Formula: K(AlSi3O8) Reference: SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills" |
β 'Tourmaline' Formula: A(D3)G6(T6O18)(BO3)3X3Z Reference: SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills" |
List of minerals arranged by Strunz 10th Edition classification
Group 9 - Silicates | |||
---|---|---|---|
β | 'Beryl' | 9.CJ.05 | Be3Al2(Si6O18) |
β | 'Microcline' | 9.FA.30 | K(AlSi3O8) |
Unclassified Minerals, Rocks, etc. | |||
β | 'Apatite' | - | |
β | 'Tourmaline' | - | A(D3)G6(T6O18)(BO3)3X3Z |
List of minerals arranged by Dana 8th Edition classification
Group 61 - CYCLOSILICATES Six-Membered Rings | |||
---|---|---|---|
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution | |||
β | Beryl | 61.1.1.1 | Be3Al2(Si6O18) |
Group 76 - TECTOSILICATES Al-Si Framework | |||
Al-Si Framework with Al-Si frameworks | |||
β | Microcline | 76.1.1.5 | K(AlSi3O8) |
Unclassified Minerals, Rocks, etc. | |||
β | 'Apatite' | - | |
β | 'Tourmaline' | - | A(D3)G6(T6O18)(BO3)3X3Z |
List of minerals for each chemical element
Be | Beryllium | |
---|---|---|
Be | β Beryl | Be3Al2(Si6O18) |
B | Boron | |
B | β Tourmaline | A(D3)G6(T6O18)(BO3)3X3Z |
O | Oxygen | |
O | β Beryl | Be3Al2(Si6O18) |
O | β Microcline | K(AlSi3O8) |
O | β Tourmaline | A(D3)G6(T6O18)(BO3)3X3Z |
Al | Aluminium | |
Al | β Beryl | Be3Al2(Si6O18) |
Al | β Microcline | K(AlSi3O8) |
Si | Silicon | |
Si | β Beryl | Be3Al2(Si6O18) |
Si | β Microcline | K(AlSi3O8) |
K | Potassium | |
K | β Microcline | K(AlSi3O8) |
Regional Geology
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
Paleoproterozoic 1600 - 2500 Ma ID: 3191697 | Paleoproterozoic crystalline metamorphic rocks Age: Proterozoic (1600 - 2500 Ma) Lithology: Paragneiss Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154] |
Paleoproterozoic 1600 - 2500 Ma ID: 3020062 | Metamorphosed Black Shale Age: Proterozoic (1600 - 2500 Ma) Description: Dark-gray biotite schist, biotite-muscovite schist, pyritic biotite schist, and local massive chert beds. Thickness approximately 2000-4000 ft (610-1,219 m). Lithology: Major:{biotite schist}, Minor:{chert} Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133] |
Paleoproterozoic 1600 - 2500 Ma ID: 2476953 | Metamorphosed black shale Age: Proterozoic (1600 - 2500 Ma) Description: Thin-bedded, dark phyllite, biotite schist, or garnet schist, depending on metamorphic grade. Resembles metamorphosed black shale (unit Xbs1) but contains thin units of metagraywacke. Equivalent to part of Oreville Formation (RattΓ© and Wayland, 1969). Interpreted to be stratigraphically higher than unit Xbs1 in central Black Hills but pinches out north of Pactola Lake. Thickness as much as 700 m in Hill City 7.5-minute quadrangle. Reference: Redden, J.A., E. DeWitt. Maps Showing Geology, Structure, and Geophysics of the Central Black Hills, South Dakota. U.S. Geological Survey Scientific Investigations Map 2777. [73] |
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License