| Computer Code: |
BEDS |
Preferred Map Code: |
BedS |
| Status Code: |
Full |
| Age range: |
Aptian Age (KP)
— Albian Age (KA) |
| Lithological Description: |
Very clayey, fine-grained, poorly-sorted, glauconitic sand or very fine-grained sandy clay. |
| Definition of Lower Boundary: |
Upward change from usually clay-free glauconitic sand (Child Okeford Sands) to very clayey, fine-grained sand. |
| Definition of Upper Boundary: |
Usually capped by a thin pebble bed that marks the basal bed of the Gault Formation. Where the pebble bed is absent, the boundary is indistinct but drawn at the change from very clayey glauconitic sand, to glauconitic sandy clay. |
| Thickness: |
Between 0 and 5 m. |
| Geographical Limits: |
Patchy distribution across the south-western part of the Shaftesbury sheet (313); more continuous outcrop between Child Okeford (ST830 130) to (ST860 180). |
| Parent Unit: |
Folkestone Formation (FO)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Near Piper's Mill, southeast of Bedchester. Jukes-Browne, 1891. |
| Reference Section |
Borehole, 600 m north-east of crossroads at Bedchester (ST81NE/2) (1.6m - 2.3m). |
| Reference(s): |
| Hopson, P M, Wilkinson, I P and Woods, M A. 2008. A stratigraphical framework for the Lower Cretaceous of England. British Geological Survey. British Geological Survey Research Report, RR/08/03. |
| Bristow, C R. 1991. Geology of Sheet ST 81 (Shillingstone-Compton Abbas, Dorset). British Geological Survey Technical Report WA/91/03. |
| White, H J O. 1923. The geology of the country south and west of Shaftesbury. Memoir of the Geological Survey of Great Britain, Sheet 313 (England and Wales). |
| Bristow, C R, Barton, C M, Freshney, E C, Wood, C J, Evans, D J, Cox, B M, Ivimey-Cook, H C, and Taylor, R T. 1995. Geology of the country around Shaftesbury. Memoir of the British Geological Survey, Sheet 313 (England and Wales). |
| Jukes-Browne, A J, 1891. Notes on an undescribed area of Lower Greensand or Vectian in Dorset. Geological Magazine, (3), Vol.8, p.456-458. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E313
|
