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Midvale Mine, South Mountain, Midvale, Rockbridge Co., Virginia, USA

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Latitude & Longitude (WGS84): 37° 49' 59'' North , 79° 16' 59'' West
Latitude & Longitude (decimal): 37.83333,-79.28333
GeoHash:G#: dnxx5z7eh
Locality type:Mine
Köppen climate type:Cfa : Humid subtropical climate


A locality near South Mountain, Midvale, which is South of Vesuvius. An iron mine started in the 1890s that produced only about 20,000 tons of limonite ore. Workings feature a pit 600 feet long, 50 feet wide and 20 feet deep, in brecciated ferruginous sandstone.

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Midvale Mine

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals. 1 (TL) - type locality of valid minerals.

Detailed Mineral List:

Cacoxenite
Formula: Fe3+24AlO6(PO4)17(OH)12 · 75H2O
Reference: Minerals of Virginia, 1990 by R. V. Dietrich
Dufrénite
Formula: Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
Reference: Rocks&Min. 47:594 (1972)
Goethite
Formula: α-Fe3+O(OH)
Reference: Rocks&Min. 47:594 (1972)
Hematite
Formula: Fe2O3
Reference: Rocks&Min. 47:594 (1972)
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
Description: Occurs in brecciated ferruginous sandstone.
Reference: Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 562; Rocks & Minerals: 57: 20; Rocks and Minerals: 60: 168.
Kidwellite
Formula: NaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33
Reference: Rocks & Min.: 57:20 & 60:168.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Rocks&Min. 47:594 (1972)
Manganite
Formula: Mn3+O(OH)
Reference: Rocks&Min. 47:594 (1972)
'Psilomelane'
Reference: Rocks&Min. 47:594 (1972)
Rockbridgeite (TL)
Formula: Fe2+Fe3+4(PO4)3(OH)5
Description: Occurs in brecciated ferruginous sandstone.
Reference: Frondel, C. (1949) The dufrenite problem. American Mineralogist, vol. 34, p. 513-540.; Palache, C., Berman, H., & Frondel, C. (1951) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 562, 868.; Kingsbury, A.W.G. (1957) Rockbridgeite from Cornwall and Devon. Mineralogical Magazine, vol. 31, n° 236, 429-430.; Rocks & Minerals: 64: 44.
Strengite
Formula: FePO4 · 2H2O
Reference: Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 760; Rocks & Minerals: 57: 20; Rocks and Minerals: 60: 168.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Goethite'4.00.α-Fe3+O(OH)
'Hematite'4.CB.05Fe2O3
'Manganite'4.FD.15Mn3+O(OH)
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
'Jarosite'7.BC.10KFe3+ 3(SO4)2(OH)6
Group 8 - Phosphates, Arsenates and Vanadates
'Cacoxenite'8.DC.40Fe3+24AlO6(PO4)17(OH)12 · 75H2O
'Dufrénite'8.DK.15Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
'Kidwellite'8.DK.20NaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33
'Rockbridgeite' (TL)8.BC.10Fe2+Fe3+4(PO4)3(OH)5
'Strengite'8.CD.10FePO4 · 2H2O
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)
'Psilomelane'-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Manganite6.1.3.1Mn3+O(OH)
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Jarosite30.2.5.1KFe3+ 3(SO4)2(OH)6
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
(AB)5(XO4)2·xH2O
Strengite40.4.1.2FePO4 · 2H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)3Zq
Rockbridgeite (TL)41.9.2.1Fe2+Fe3+4(PO4)3(OH)5
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)5(XO4)3Zq·xH2O
Kidwellite42.8.2.1NaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33
(AB)7(XO4)4Zq·xH2O
Dufrénite42.9.1.2Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
Miscellaneous
Cacoxenite42.13.5.1Fe3+24AlO6(PO4)17(OH)12 · 75H2O
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)
'Psilomelane'-

List of minerals for each chemical element

HHydrogen
H CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
H DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
H Goethiteα-Fe3+O(OH)
H JarositeKFe3+ 3(SO4)2(OH)6
H KidwelliteNaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33
H Limonite(Fe,O,OH,H2O)
H ManganiteMn3+O(OH)
H RockbridgeiteFe2+Fe43+(PO4)3(OH)5
H StrengiteFePO4 · 2H2O
OOxygen
O CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
O DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
O Goethiteα-Fe3+O(OH)
O HematiteFe2O3
O JarositeKFe3+ 3(SO4)2(OH)6
O KidwelliteNaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33
O Limonite(Fe,O,OH,H2O)
O ManganiteMn3+O(OH)
O RockbridgeiteFe2+Fe43+(PO4)3(OH)5
O StrengiteFePO4 · 2H2O
NaSodium
Na KidwelliteNaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33
AlAluminium
Al CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
PPhosphorus
P CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
P DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
P KidwelliteNaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33
P RockbridgeiteFe2+Fe43+(PO4)3(OH)5
P StrengiteFePO4 · 2H2O
SSulfur
S JarositeKFe3+ 3(SO4)2(OH)6
KPotassium
K JarositeKFe3+ 3(SO4)2(OH)6
CaCalcium
Ca DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
MnManganese
Mn ManganiteMn3+O(OH)
FeIron
Fe CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
Fe DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
Fe Goethiteα-Fe3+O(OH)
Fe HematiteFe2O3
Fe JarositeKFe3+ 3(SO4)2(OH)6
Fe KidwelliteNaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33
Fe Limonite(Fe,O,OH,H2O)
Fe RockbridgeiteFe2+Fe43+(PO4)3(OH)5
Fe StrengiteFePO4 · 2H2O

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]

Cambrian
485.4 - 541 Ma



ID: 2897807
Shady Dolomite

Age: Cambrian (485.4 - 541 Ma)

Stratigraphic Name: Shady Dolomite

Description: Shady Dolomite (Keith, 1903). Dolostone with minor limestone and shale divided into three members: Ivanhoe (upper) Member; Austinville (middle) Member, and Patterson (lower) Member. Ivanhoe Member, dark-gray, fine-grained limestone and minor interbedded black shale; 100 to 500 feeet thick. Austinville Member, very-light-gray to cream colored, fine- to medium-grained, crystalline or saccharoidal, massive-bedded dolostone with several sequences of interbedded limestone, very-dark-gray dolostone or mottled dolostone and shale; 1000 feet thick. Patterson Member, medium- to dark-gray, fine-grained, thin-bedded dolostone or limestone with siliceous partings and intraformational brec ia beds; 800 feet thick. The Shady Dolomite is gradational with the underlying Erwin Formation and the upper two members grade southeastward into shaly dolostone with biohermal mounds, intraformational limestone or dolostone breccias, oolitic limestone, and arenaceous limestone and dolostone. This upper,southeastern facies, is in part equivalent to beds in the lower Rome Formation (Pfi el and Read, 1980). The Shady is very poorly exposed except near New River in Wythe and Smyth counties where it is at least 2100 feet thick and where major lead and zinc deposits were mined from the upper members (Currier, 1935).

Comments: Appalachian Plateaus and Valley and Ridge

Lithology: Major:{dolostone}, Minor:{limestone,shale}

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]

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)
Frondel, C. (1949) The dufrenite problem. American Mineralogist, vol. 34, p. 513-540.
Palache, C., Berman, H., & Frondel, C. (1951) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 868.
Kingsbury, A.W.G. (1957) Rockbridgeite from Cornwall and Devon. Mineralogical Magazine, vol. 31, n° 236, 429-430 (referring to Frondel, 1949).
Rocks & Minerals: 47: 596.
Rocks & Minerals: 57: 20.
Rocks & Minerals: 60: 168.
Rocks & Minerals: 64: 44.


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