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Route 85A, Pringle, Custer District, Custer Co., South Dakota, USA

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Latitude & Longitude (WGS84): 43° 38' 13'' North , 103° 35' 57'' West
Latitude & Longitude (decimal): 43.63720,-103.59930
GeoHash:G#: 9xy24xcm1
Köppen climate type:Dfb : Warm-summer humid continental climate


2 miles north of Pringle. Near common corner of sections 1, 2, 11, 12 T5S R4E
4 miles east of town.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


1 valid mineral.

Detailed Mineral List:

Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"
'Limonite'
Formula: (Fe,O,OH,H2O)
Description: Pseudomorphs after pyrite
Reference: SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills"

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
'Almandine'9.AD.25Fe2+3Al2(SiO4)3
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)

List of minerals for each chemical element

HHydrogen
H Limonite(Fe,O,OH,H2O)
OOxygen
O AlmandineFe32+Al2(SiO4)3
O Limonite(Fe,O,OH,H2O)
AlAluminium
Al AlmandineFe32+Al2(SiO4)3
SiSilicon
Si AlmandineFe32+Al2(SiO4)3
FeIron
Fe AlmandineFe32+Al2(SiO4)3
Fe Limonite(Fe,O,OH,H2O)

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: 2968999
Upper Metagraywacke

Age: Proterozoic (1600 - 2500 Ma)

Description: Light- to dark-gray, quartz-mica-feldspar schist, quartz-mica schist, staurolite and garnet-rich schist, metaconglomerate, calc-silicate gneiss, and cummingtonite-quartz schist. Thickness up to 14,000 ft (4,267 m).

Lithology: Major:{schist,metaconglomerate,gneiss}

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: 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: 2476989
Distal metagraywacke

Age: Proterozoic (1600 - 2500 Ma)

Description: Grayish-tan schist and siliceous schist containing considerable garnet, staurolite, and sillimanite. Calc-silicate lenses developed from former concretions. Restricted to area southwest of Grand Junction fault. Includes Mayo Formation and middle part of Bugtown Formation (Redden, 1963). Correlation of Mayo Formation uncertain due to faulting but may be equivalent to upper graywacke (unit Xgw3). Thickness of Mayo part of unit about 3,600 m.

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


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