The BGS Lexicon of Named Rock Units — Result Details

Embleton Microdiorite Intrusions

Computer Code: EMBL Preferred Map Code: notEntered
Status Code: Full
Age range: Ordovician Period (O) — Ordovician Period (O)
Lithological Description: Microdiorite, aphyric basalt, andesite and microgranodiorite. Radiometric age: 444 +/- 24 Ma (Rb-Sr whole rock) (Rundle, 1979).
Definition of Lower Boundary: Not defined.
Definition of Upper Boundary: Not defined.
Thickness: Plugs and sheet-like masses emplaced into the Skiddaw Group.
Geographical Limits: The area east of Cockermouth, Cumbria.
Parent Unit: Lake District Ordovician Minor Intrusion Suite (LDOMI)
Previous Name(s): Embleton Diorite (-888)
Alternative Name(s): none recorded or not applicable
Type Section  Close Quarry,Embleton. Eastwood et al (1968) Area. 
Millward, D. 2002. Early Palaeozoic magmatism in the English Lake District. Proceedings of the Yorkshire Geological Society, Vol. 54, Part 2, 65-93. 
Eastwood,T, Hollingworth, S E, Rose, W C C and Trotter, F M. 1968. Geology of the country around Cockermouth and Caldbeck. Memoir of the Geological Survey of Great Britain, England and Wales, Sheet 23. 
Rundle, C C, 1979. Ordovician intrusions in the English Lake District. Journal of the Geological Society of London, Vol.136, 29-38. 
Fortey, N J, Cooper, A H, Henney, P J, Colman,T and Nancarrow, P H A. 1994. Appinitic intrusions in the English Lake District. Mineralogy and Petrology, Vol. 51, p. 355-375. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E023 E031