| Computer Code: |
RDBN |
Preferred Map Code: |
Rdbn |
| Status Code: |
Full |
| Age range: |
Aalenian Age (JA)
— Callovian Age (JC) |
| Lithological Description: |
[Obsolete: use GOG, INO] Sequence of limestones, mudstones and silty sandstones. |
| Definition of Lower Boundary: |
Unconformity at top of Lias Group; basal formation of Redbourne Group may be Northampton Sand, Grantham Formation or Lincolnshire Limestone. |
| Definition of Upper Boundary: |
Top of Cornbrash/base of Kellaways Formation. |
| Thickness: |
Averages 55 TO 65m in Type Area. |
| Geographical Limits: |
East Midland Shelf area, Northamptonshire to Market Weighton area. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Nettleton Bottom Borehole (TF19NW/54), 320.65 to 391.70m. |
| Reference Section |
Metheringham Quarry (Metheringham and Blankney Members, 'Middle' or Upper part of Lower Lincolnshire Limestone). (Ashton, 1980). |
| Type Area |
Redbourne area (north Lincolnshire/south Humberside). |
| Reference Section |
Leadenham Quarry (part of Upper Lincolnshire Limestone and part of Lower, including base) (Sumbler and others, 1990). |
| Reference Section |
Main Quarry, Ketton, (Richardson, 1939), including trial shaft in Quarry floor. |
| Reference Section |
Walks Farm Borehole, Howell, near Hockington (TF14NE/18) from 98.37 to 122.29m, (Cornbrash to within top of Lincolnshire Limestone). |
| Reference Section |
Copper Hill Quarry, Ancaster, showing Upper Lincolnshire Limestone and part of Lower Lincolnshire Limestone, (Sumbler and others, 1990). |
| Reference(s): |
| Gaunt, G D, Fletcher, T P, and Wood, C J. 1992. Geology of the country around Kingston upon Hull and Brigg. Memoir of the British Geological Survey, sheets 80 and 89 (England and Wales). 172pp. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E080
E081
E089
E072
E090
E091
E115
|
