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Illite from
Greenside Mine, Patterdale, Eden, Cumbria, England, UK

Locality type:Mine
Classification
Species:Muscovite var: Illite
Formula:K0.65Al2.0[Al0.65Si3.35O10](OH)2
Age information
Maximum recorded age:372 Ma
Minimum recorded age:324 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
1325 MaMississippian - K-Ar
2372 MaLate Devonian - K-Ar
3324 MaMississippian - K-Ar
Sample references:
SampleReference
1 - Ineson, P. R. and Mitchell, J. G. (1974) K-Ar isotopic age determinations from the Lake District mineral localities.
2 -   "  "
3 -   "  "
Confirmation
Validity:Believed Valid
References
References:No reference listed
Data
Mineral Data:Click here to view Illite data
Locality Data:Click here to view Greenside Mine, Patterdale, Eden, Cumbria, England, UK
Nearest other occurrences of Illite
9.5km (5.9 miles) A Threlkeld Mine, Threlkeld, Threlkeld, Eden, Cumbria, England, UK
11.9km (7.4 miles) B Brundholme Mine (Glenderaterra Mine; Blencathra Mine), Glenderaterra Valley, Threlkeld, Eden, Cumbria, England, UK
12.3km (7.6 miles) C Yewthwaite Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
13.6km (8.5 miles) D Goldscope Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
13.7km (8.5 miles) E Castle Nook Mine, Newlands Valley, Above Derwent, Allerdale, Cumbria, England, UK
14.1km (8.7 miles) F Wad Mine (Plumbago Mine; Graphite Mine; Black Lead Mine), Seathwaite, Borrowdale, Allerdale, Cumbria, England, UK
16.1km (10.0 miles) G Carrock Mine, Mungrisdale, Eden, Cumbria, England, UK
16.3km (10.1 miles) H Thornthwaite Mine, Above Derwent, Allerdale, Cumbria, England, UK
16.9km (10.5 miles) I Force Crag Mine (Force Craig Mine), Coledale, Above Derwent, Allerdale, Cumbria, England, UK
18.1km (11.2 miles) J Roughton Gill Mine, Roughton Gill, Caldbeck, Allerdale, Cumbria, England, UK
18.2km (11.3 miles) K Driggith Mine (Driggeth Mine), Caldbeck, Allerdale, Cumbria, England, UK
18.8km (11.7 miles) L Old Sandbed Mine (Old Sandbeds Mine), Caldbeck, Allerdale, Cumbria, England, UK
19.6km (12.2 miles) M Old Potts Gill Mine, Potts Gill, Caldbeck, Allerdale, Cumbria, England, UK
20.5km (12.7 miles) N Coniston Copper Mines, Coniston, South Lakeland, Cumbria, England, UK
155.5km (96.6 miles) O Slate Scrin Mine, Castleton, Derbyshire, England, UK
155.6km (96.7 miles) P Wall Shaft Mine, Castleton, Derbyshire, England, UK
Mineral and/or Locality  
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