The BGS Lexicon of Named Rock Units — Result Details
Bognor Sand Member
Computer Code: | BOSA | Preferred Map Code: | BoS |
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Status Code: | Full | ||
Age range: | Eocene Epoch (GE) — Eocene Epoch (GE) | ||
Lithological Description: | Glauconitic bioturbated or cross-bedded fine- and medium-grained sands, partially cemented. | ||
Definition of Lower Boundary: | Incoming of sand and glauconite at the top of King's (1981) Division A of London Clay, (a coarsening upwards sequence of clays and silts). | ||
Definition of Upper Boundary: | At Whitecliff Bay passes up into sandy clayey silts of Division A (King, 1981) aspect but elsewhere is cut out by erosion surface at the base of the silty clays of Division B1 of London Clay (King, 1981). | ||
Thickness: | 5-10m | ||
Geographical Limits: | Easternmost Hampshire Basin. Not mapped on or West of Southampton Sheet by BGS. | ||
Parent Unit: | London Clay Formation (LC) | ||
Previous Name(s): | Bognor Sand [Obsolete Name and Code: Use BOSA]
(-2008)
Bognor Member [Obsolete Name and Code: Use BOSA] (-3863) Bognor Rock Bed [Obsolete Name and Code: Use BOSA] (-3864) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Section | Foreshore at Bognor Regis. | ||
Reference Section | Seacliffs in Whitecliff Bay, Isle of Wight. | ||
Reference(s): | |||
King, C. 1981. The stratigraphy of the London Clay and associated deposits. Tertiary Research Special Paper No.6. (Backhuys: Rotterdam). | |||
Edwards, R A, and Freshney, E C. 1987. Lithostratigraphical classification of the Hampshire Basin Palaeogene Deposits (Reading Formation to Headon Formation) Tertiary Research, Vol. 8, 43-73. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E331 |