Computer Code: |
HGP |
Preferred Map Code: |
HGP |
Status Code: |
Index Level |
Age range: |
Namurian Stage (CN)
— Namurian Stage (CN) |
Lithological Description: |
[Obsolete: use SMGP] Cyclical repetition of sandstones, siltstones, mudstones and subordinate limestones and rare coals. |
Definition of Lower Boundary: |
Conformable: at top of First Limestone. |
Definition of Upper Boundary: |
Conformable: base of Subcrenatum Marine Band or equivalent. |
Thickness: |
Approximately 200m |
Geographical Limits: |
Includes the area of British Geological Survey 1:50 000 Sheets 22 (Maryport), 23 (Cockermouth), 28 (Whitehaven). |
Parent Unit: |
none recorded or not applicable
|
Previous Name(s): |
Beds included in 'Millstone Grit' [Obsolete Name and Code: Use HGP]
(-2845)
|
Alternative Name(s): |
Stainmore Formation
|
Stratotypes: |
Type Area |
Hensingham, West Cumbria. |
Reference(s): |
Eastwood T, and others. 1968. Geology of the country around Whitehaven. Memoir of the Geological Survey of Great Britain, Sheet 28 (England and Wales). |
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. |
Eastwood, T. 1930. The geology of the Maryport district. Memoir of the Geological Survey of Great Britain. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E022
E023
E047
E028
|