The BGS Lexicon of Named Rock Units — Result Details
Eskett Limestone Formation
Computer Code: | ESKT | Preferred Map Code: | ESKT |
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Status Code: | Full | ||
Age range: | Holkerian Substage (CQ) — Pendleian Substage (CE) | ||
Lithological Description: | Limestone with thin interbeds of sandstone, siltstone, mudstone, bentonitic mudstone and seatearth mudstone. | ||
Definition of Lower Boundary: | The base of the Sixth Limestone Member, at the base of the lowest significant limestone bed above the mudstone, at the top of the underlying Seventh Limestone Formation. | ||
Definition of Upper Boundary: | The top of the First/Great Limestone Member, marked by a succession from thick-bedded limestone to mudstone and sandstone of the Hensingham Grit Member. | ||
Thickness: | From 100m to 150m | ||
Geographical Limits: | West and North Cumbria between Whitehaven and Penrith. The western limit is the truncation below the Permo-Triassic basal unconformity. The Eastern limit is taken at the Kirk Rigg Fault along the line of the A66 highway, west of Penrith (McCormack, 2001). | ||
Parent Unit: | Great Scar Limestone Group (GSCL) | ||
Previous Name(s): | Fourth Limestone [Obsolete Name and Code: Use ESKT]
(-2175)
Lower Alston Group [Obsolete Name And Code: See ESKT] (AGL) Part of: Chief Limestone Group [Obsolete Name and Code: Use ESKT] (-2789) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Partial Type Section | Eskett limestone Quarry, Frizington, Cumbria. Stabbins, 1969. | ||
Reference Section | Borehole NY01NE9, Low Leys Farm, Lamplugh, Cumbria. Rockhead down to 194 m. W H C Ramsbottom, 1955. | ||
Reference(s): | |||
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. | |||
Stabbins, R. 1969. The depositional history of the Lower Carboniferous rocks of West Cumberland. Unpublished PhD thesis, University of London. | |||
Akhurst, M C, Chadwick, R A, Holliday, D W, McCormac, M, McMillan, A A, Millward, D, Young, B, Ambrose, K, Auton, C A, Barclay, W J, Barnes, R P, Beddoe-Stephens, B, James, J C W, Johnson, H, Jones, N S, Glover, B W, Hawkins, M P, Kimbell, G S, MacPherson, K A T, Merritt, J W, Milodowski, A E, Riley, N J, Robins, N S, Stone, P, and Wingfield, R T R. 1997. The geology of the west Cumbria district. Memoir of the British Geological Survey, Sheets 28, 37 and 47 (England and Wales). 138pp. | |||
Ramsbottom, W H C. 1955. Unpublished British Geological Survey palaeontological report on boreholes NY01NE 8 and 9. | |||
Eastwood T, and others. 1968. Geology of the country around Whitehaven. Memoir of the Geological Survey of Great Britain, Sheet 28 (England and Wales). | |||
McCormac, M, 2001. The Upper Palaeozoic rocks of the Shap and Penrith district, Edenside, Cumbria. British Geological Survey Research Report, RR/01/10. | |||
Arthurton, R S, and Wadge, A J. 1981. Geology of the country around Cockermouth and Caldbeck. Memoir of the British Geological Survey of Great Britain, Sheet 23 (England and Wales). | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E022 E023 E024 E028 E037 |