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Psilomelane from
Dry Gill Mine, Caldbeck, Allerdale, Cumbria, England, UK


Locality type:Mine
Classification
Species:'Psilomelane' (not an IMA approved species)
Comments:Probably either coronadite or romanèchite. Sometimes as epimorphs after an unknown mineral, strongly resembling sheafy hemimorphite crystals (M. Leppington Collection) (Cooper & Stanley, 1990).

Green et al. (2008): "Coronadite is rare in the Caldbeck Fells. It was reported by Hartley (1959) from Dry Gill Mine and is sometimes assumed to be fairly common there, but recent research has shown that almost all of the black manganese oxide that accompanies Dry Gill campylite is romanèchite."
Habit:occasionally botryoidal
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Mimetite13
- var Campylite13
Quartz6
Data
Mineral Data:Click here to view Psilomelane data
Locality Data:Click here to view Dry Gill Mine, Caldbeck, Allerdale, Cumbria, England, UK
Data Identifiers
Mindat Occurrence Record ID:8935
Long-form Identifier:1:3:8935:7
GUID (UUID V4):0
Nearest other occurrences of Psilomelane
0.8km (0.5 miles) ⓘBrandy Gill Mine, Mungrisdale, Eden, Cumbria, England, UK
0.9km (0.6 miles) ⓘDriggith Mine, Caldbeck, Allerdale, Cumbria, England, UK
1.4km (0.9 miles) ⓘArm O'Grain, Mungrisdale, Eden, Cumbria, England, UK
1.5km (0.9 miles) ⓘOld Sandbed Mine, Caldbeck, Allerdale, Cumbria, England, UK
1.8km (1.1 miles) ⓘTodd Gill, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.8km (1.1 miles) ⓘMexico Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
1.8km (1.1 miles) ⓘIron Crag, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.0km (1.2 miles) ⓘOld Potts Gill Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.1km (1.3 miles) ⓘHay Gill Copper Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
2.1km (1.3 miles) ⓘRoughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
References
Greg, Robert Philips, Lettsom, William G. (1858) Manual of the Mineralogy of Great Britain and Ireland. John Van Voorst, London.
Hall, Townshend M. (1868) The Mineralogist's Directory: or, a guide to the Principal Mineral Localities in the United Kingdom of Great Britain and Ireland. Edward Stanford.
Goodchild, J. G. (1882) Contributions towards a List of the Minerals occurring in Cumberland and Westmoreland. Transactions of the Cumberland Association for the Advancement of Literature and Science, 7. The Cumberland Association for the Advancement of Literature and Science. 101-126
Eastwood, T. (1921) The Lead and Zinc Ores of the Lake District. Special Reports on the Mineral Resources of Great Britain Vol. 22. Geological Survey of Great Britain
Hartley, J. (1959) Coronadite from Cumberland. Mineralogical Magazine, 32, 343-344.
Kingsbury, Arthur W. G., Hartley, J. (1960) Carminite and beudantite from the northern part of the Lake District and from Cornwall. Mineralogical Magazine and Journal of the Mineralogical Society, 32 (249) 423-432 doi:10.1180/minmag.1960.032.249.01
Embrey, Peter G. (1978) Fourth supplementary list of British minerals. Mineralogical Magazine, 42 (322) 169-177 doi:10.1180/minmag.1978.042.322.01
Hartley, J. (1984) A list of minerals associated with the ore deposits of the Caldbeck Fells, Cumbria. Transactions of the Leeds Geological Association, 10 (3) 22-39
Cooper, M. P., Stanley, C. J. (1990) Minerals of the English Lake District - Caldbeck Fells. The Natural History Museum, London.
 
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