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While externally similar shapes, these two minerals are very different inside.
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Microcline from
Wharf Mine, Bald Mountain Mining District (Portland Mining District), Lawrence County, South Dakota, USA


Locality type:Mine
Classification
Species:Microcline
Formula:K(AlSi3O8)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Microcline data
Locality Data:Click here to view Wharf Mine, Bald Mountain Mining District (Portland Mining District), Lawrence County, South Dakota, USA
Data Identifiers
Mindat Occurrence Record ID:983747
Long-form Identifier:1:3:983747:8
GUID (UUID V4):0
Nearest other occurrences of Microcline
17.0km (10.6 miles) ⓘGiant-Volney mine, Tinton Pegmatite Mining District, Lawrence County, South Dakota, USA
17.1km (10.7 miles) ⓘRough and Ready mine, Tinton Pegmatite Mining District, Lawrence County, South Dakota, USA
19.4km (12.0 miles) ⓘMineral Hill pegmatite area, Crook County, Wyoming, USA
51.6km (32.1 miles) ⓘMateen Mine (Mattine Mine; Century Lode Claim; Nevada No. 2 Mine), Hill City Mining District, Pennington County, South Dakota, USA
56.9km (35.3 miles) ⓘTin Queen Mine (White Blowout Mine), Hill City Mining District, Pennington County, South Dakota, USA
57.5km (35.7 miles) ⓘLouise & Hunter Claim (Hunter and Louise Spodumene Dike), Oreville Mining District, Pennington County, South Dakota, USA
57.5km (35.8 miles) ⓘBob Ingersoll Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
58.0km (36.0 miles) ⓘHigh Climb Mine, Custer, Custer Mining District, Custer County, South Dakota, USA
58.1km (36.1 miles) ⓘGap Lode Pegmatite, Unorganized mining district [5], Pennington County, South Dakota, USA
59.2km (36.8 miles) ⓘSitting Bull pegmatite, Keystone, Keystone Mining District, Pennington County, South Dakota, USA
References
PEDRAZA ROJAS, Johana Margaret, HOLLEY, Elizabeth, WENDLANDT, Richard, PFAFF, Katharina and RASMUSSEN, Hans (2016) Geologic Control on Alteration and Mineralization of the Wharf Mine, South Dakota. Geological Society of America Abstracts with Programs. Vol. 48, No. 7
 
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