| Computer Code: |
WTT |
Preferred Map Code: |
Wtt |
| Status Code: |
Full |
| Age range: |
Ypresian Age (GY)
— Lutetian Age (GL) |
| Lithological Description: |
Greyish brown laminated clay; wavy- to lenticular-bedded sand interbedded with clay in equal proportions; and fine- to medium-grained sparsely glauconitic sand. |
| Definition of Lower Boundary: |
Rests on London Clay, a dark grey bioturbated clay below with marked lithological change to interbedded glauconitic fine-grained sand and very silty clay above. |
| Definition of Upper Boundary: |
Overlain by Earnley Sand Formation, well marked by the transgressive basal surface of glauconitic silty sands with pebbles. |
| Thickness: |
40-53m. |
| Geographical Limits: |
Eastern Hampshire Basin. |
| Parent Unit: |
Bracklesham Group (BRB)
|
| Previous Name(s): |
Wittering 'Division'
(-621)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Whitecliff Bay seacliffs, Isle of Wight. |
| Reference Section |
Bracklesham Bay foreshore. |
| Reference(s): |
| 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: |
|
E315
E331
E314
|
