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Linwood Mine, Buffalo, Scott Co., Iowa, USAi
Regional Level Types
Linwood MineMine
Buffalo- not defined -
Scott Co.County
IowaState
USACountry

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Latitude & Longitude (WGS84): 41° 27' 55'' North , 90° 41' 4'' West
Latitude & Longitude (decimal): 41.46532,-90.68452
GeoHash:G#: 9zrebkt8c
Locality type:Mine
Köppen climate type:Dfa : Hot-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Buffalo1,299 (2017)3.4km
Andalusia1,182 (2017)4.0km
Blue Grass1,676 (2017)8.3km
Milan5,096 (2017)9.5km
Rock Island38,620 (2017)10.1km


Originally an open pit mine, it is now worked underground.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


10 valid minerals.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Marcasite2.EB.10aFeS2
Pyrite2.EB.05aFeS2
Sphalerite2.CB.05aZnS
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Gypsum7.CD.40CaSO4 · 2H2O
Melanterite7.CB.35Fe2+(H2O)6SO4 · H2O

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Marcasite2.12.2.1FeS2
Pyrite2.12.1.1FeS2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Melanterite29.6.10.1Fe2+(H2O)6SO4 · H2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2

List of minerals for each chemical element

HHydrogen
H GypsumCaSO4 · 2H2O
H MelanteriteFe2+(H2O)6SO4 · H2O
CCarbon
C DolomiteCaMg(CO3)2
C CalciteCaCO3
OOxygen
O DolomiteCaMg(CO3)2
O GypsumCaSO4 · 2H2O
O MelanteriteFe2+(H2O)6SO4 · H2O
O QuartzSiO2
O BaryteBaSO4
O CalciteCaCO3
MgMagnesium
Mg DolomiteCaMg(CO3)2
SiSilicon
Si QuartzSiO2
SSulfur
S ChalcopyriteCuFeS2
S GypsumCaSO4 · 2H2O
S MelanteriteFe2+(H2O)6SO4 · H2O
S SphaleriteZnS
S PyriteFeS2
S BaryteBaSO4
S MarcasiteFeS2
CaCalcium
Ca DolomiteCaMg(CO3)2
Ca GypsumCaSO4 · 2H2O
Ca CalciteCaCO3
FeIron
Fe ChalcopyriteCuFeS2
Fe MelanteriteFe2+(H2O)6SO4 · H2O
Fe PyriteFeS2
Fe MarcasiteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn SphaleriteZnS
BaBarium
Ba BaryteBaSO4

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

Paleozoic
251.902 - 541 Ma



ID: 3187973
Paleozoic sedimentary rocks

Age: Phanerozoic (251.902 - 541 Ma)

Lithology: Sedimentary rocks

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]

Frasnian - Givetian
372.2 - 387.7 Ma



ID: 3024678
Cedar Valley Group

Age: Devonian (372.2 - 387.7 Ma)

Stratigraphic Name: Cedar Valley Group

Description: Interval includes Little Cedar, Coralville, Lithograph City, and Shell Rock formations; Shell Rock Fm in northern Iowa only. Primary Lithologies: limestone, fossiliferous, variably argillaceous, part biostromal; dolomite, part fossil-moldic to vuggy, variably argillaceous. Secondary Lithologies: limestone, dense, “sublithographic”; dolomite/limestone breccia (evaporite collapse); limestone, sparse to unfossiliferous, argillaceous to shaly; shale, gray to green-gray, dolomitic. Minor: anhydrite/gypsum (outcrop belt only in Grundy, Tama, Poweshiek counties; extensive in subsurface of central and southern Iowa); chert; glauconite; sandy limestone/sandstone. Maximum thicknesses in outcrop belt: southeast Iowa, 80-135 ft (24-41 m); east-central Iowa 130-210 ft (40-64 m); northern Iowa 250-350 ft (76-107 m). Cedar Valley Group thins and is overstepped by Dl westward in Winnebago County.

Comments: Original map source: Witzke, Brian J., Anderson, Raymond R., and Pope, John P., 2010, Iowa Geological and Water Survey, DNR, Bedrock Geologic Map of Iowa, OFM-2010-1. Scale 1:500,000.

Lithology: Major:{limestone,dolostone}, Minor:{sedimentary breccia,shale}, Incidental:{anhydrite, 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]

Frasnian - Givetian
372.2 - 387.7 Ma



ID: 2162504
Cedar Valley Group

Age: Devonian (372.2 - 387.7 Ma)

Stratigraphic Name: Cedar Valley Group

Description: Interval includes Little Cedar, Coralville, Lithograph City, and Shell Rock formations; Shell Rock Fm in northern Iowa only. Primary Lithologies: limestone, fossiliferous, variably argillaceous, part biostromal; dolomite, part fossil-moldic to vuggy, variably argillaceous. Secondary Lithologies: limestone, dense, "sublithographic"; dolomite/limestone breccia (evaporite collapse); limestone, sparse to unfossiliferous, argillaceous to shaly; shale, gray to green-gray, dolomitic. Minor: anhydrite/gypsum (outcrop belt only in Grundy, Tama, Poweshiek counties; extensive in subsurface of central and southern Iowa); chert; glauconite; sandy limestone/sandstone. Maximum thicknesses in outcrop belt: southeast Iowa, 80-135 ft (24-41 m); east-central Iowa 130-210 ft (40-64 m); northern Iowa 250-350 ft (76-107 m). Cedar Valley Group thins and is overstepped by Dl westward in Winnebago County.

Reference: Witzke, B.J., R.R. Anderson, J.P. Pope. Iowa Bedrock Geologic Map. Iowa Geological and Water Survey, DNR. [26]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Garvin, P.L. & D. M. Crawford (1992) Minerals of the Linwood mine, Scott County, Iowa. The Mineralogical Record: 23 (3): 231-238.

External Links

Linwood Mining & Minerals - http://www.linwood-mining.com/


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