The BGS Lexicon of Named Rock Units — Result Details
Ennerdale Intrusion
| Computer Code: | ENIN | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Ordovician Period (O) — Ordovician Period (O) | ||
| Lithological Description: | A medium-grained granophyric granite and microgranite, with zones of diorite, dolerite and hybridised rocks. | ||
| Definition of Lower Boundary: | Not defined. | ||
| Definition of Upper Boundary: | Not defined. | ||
| Thickness: | A laccolith, about 1km thick, and with an area of about 53 sq. km intruded into the Skiddaw Group and the lower part of the Borrowdale Volcanic Group. | ||
| Geographical Limits: | From Wasdale to Ennerdale, western Lake District. | ||
| Parent Unit: | Lake District Ordovician Felsic Plutonic Suite (LDFP) | ||
| Previous Name(s): | Ennerdale Granophyre [Obsolete Name and Code: Use ENIN]
(-4028)
Ennerdale Intrusion, Granite [Obsolete Code: Use ENIN + Rock Type] (ENGR) Ennerdale Intrusion, Granophyre [Obsolete Code: Use ENIN + Rock Type] (ENN) Ennerdale Intrusion, Microdiorite [Obsolete Code: Use ENIN + Rock Type] (ENNR) Ennerdale Intrusion, Diorite [Obsolete Code: Use ENIN + Rock Type] (ENDI) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Bowness Knott, Ennerdale. Fettes (in Stephenson et al.,1999) | ||
| Reference(s): | |||
| Millward, D, Johnson, E W, Beddoe-Stephens, B, Young, B, Kneller, B C, Lee, M K, Fortey, N J, Allen, P M, Branney, M J, Cooper, D C, Hirons, S, Kokelaar, B P, Marks, R J, McConnell, B J, Merritt, J W, Molyneux, S G, Petterson, M G, Roberts, B, Rundle, C C, Rushton, A W A, Scott, R W, Soper, N J, and Stone, P. 2000. Geology of the Ambleside district. Memoir of the British Geological Survey, England and Wales, Sheet 38. | |||
| Woodhall, D G. 2000. Geology of the Keswick district. British Geological Survey Sheet Description, England and Wales, Sheet 29. | |||
| Hughes, R A, Evans, J A, Noble, S R, and Rundle, C C. 1996. U-Pb chronology of the Ennerdale and Eskdale intrusions supports sub-volcanic relationships with the Borrowdale Volcanic Group (Ordovician, English Lake District). Journal of the Geological Society, London, Vol. 153, p. 33-38. | |||
| Fettes, D. 1999. Bowness Knott. 190-193 in Stephenson D, Bevins R E, Millward D, Highton A J, Parsons I, Stone P, and Wadsworth W J. Caledonian igneous rocks of the British Isles. (Peterborough: Joint Nature Conservation Committee.) | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E037 E029 E028 E038 | |||