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Hill-Ledford Mine, Cave-in-Rock, Cave-in-Rock Mining Sub-District, Hardin Co., Illinois, USAi
Regional Level Types
Hill-Ledford MineMine
Cave-in-Rock- not defined -
Cave-in-Rock Mining Sub-DistrictSubdistrict
Hardin Co.County
IllinoisState
USACountry

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Key
Latitude & Longitude (WGS84):
37° 31' 40'' North , 88° 9' 48'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Cave-in-Rock318 (2011)6.5km
Elizabethtown287 (2017)15.5km
Sturgis1,912 (2017)16.0km
Old Shawneetown178 (2017)18.9km
Rosiclare1,082 (2017)19.9km


The Hill-Ledford Mine operated by the Ozark-Mahoning Company from the late 1950’s into the 1970’s (Denny et al., 2013). The mineralization was in an oval collapsed breccia in the Aux Vases Sandstone. It is thought to be formed by dissolution and mineralization within a “feeder Pipe”. The vertical displacement of the breccia is about 75 feet (Brecke, 1962)

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


5 valid minerals.

Detailed Mineral List:

'Bitumen'
Reference: Philip Bluemner Photo
Calcite
Formula: CaCO3
Reference: Steve Sorrell Collection
Fluorite
Formula: CaF2
Habit: Crystals to 0.5m on edge
Reference: Rocks & Min.:64:18.; Econ Geol (1994) 89:288-306; Rocks & Min.: 63:210-226
Galena
Formula: PbS
Reference: Rocks & Min.:64:18.; Rocks & Min.: 63:210-226
Quartz
Formula: SiO2
Reference: Econ Geol (1994) 89:288-306; Rocks & Min.: 63:210-226
Sphalerite
Formula: ZnS
Reference: Rocks & Min.: 63:210-226

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Galena2.CD.10PbS
Sphalerite2.CB.05aZnS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Unclassified Minerals, Rocks, etc.
'Bitumen'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Galena2.8.1.1PbS
Sphalerite2.8.2.1ZnS
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
'Bitumen'-

List of minerals for each chemical element

CCarbon
C CalciteCaCO3
OOxygen
O QuartzSiO2
O CalciteCaCO3
FFluorine
F FluoriteCaF2
SiSilicon
Si QuartzSiO2
SSulfur
S GalenaPbS
S SphaleriteZnS
CaCalcium
Ca FluoriteCaF2
Ca CalciteCaCO3
ZnZinc
Zn SphaleriteZnS
PbLead
Pb GalenaPbS

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Brecke, E.A. (1962) Ore genesis of the Cave-in-Rock Fluorspar District, Hardin County, Illinois, Economic Geology: 57 (4): 499-535.
Baxter, J.W., Potter, P.E., and Doyle, F.L. (1963) Areal geology of the Illinois fluorspar district, Part 1, Saline Mines, Cave in Rock, Dekoven, and Repton Quadrangles, Illinois State Geological Survey: Circular 342: 1-43.
Lillie, R.C. (1988) Minerals of the Harris Creek Fluorspar District, Hardin County, Illinois. Rocks and Minerals: 63 (3): 210-226.
Lasmanis, R. (1989) Galena from Mississippi-Valley type deposits. Rocks and Minerals: 64 (1): 11-34.
Denny, F.B, Devera, J.A., and Kittler, A. (2013) Bedrock Geology of Saline Mines Quadrangle, Gallatin and Hardin Counties, Illinois: Illinois State Geological Survey, Illinois Geologic Quadrangle Map, IGQ Saline Mines-BG: 1-10.

Other Regions, Features and Areas containg this locality

North America PlateTectonic Plate
USA

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