| Computer Code: |
WMLO |
Preferred Map Code: |
notEntered |
| Status Code: |
Pending Upgrade |
| Age range: |
Early Pleistocene (QPE)
— Mid Pleistocene (QPM) |
| Lithological Description: |
A terrace deposit of the Sudbury Formation in the Valley of the Upper Thames upstream of Oxford. The oldest fluvial unit yet identified in the Sudbury Formation of the Upper Thames, although scattered pebbles of Northern Drift type occur at higher elevations (over 300 m OD) in the north Cotswolds.
Quartzite and quartz gravel in a clay matrix. It is characterised by a particularly high ratio of quartz to quartzite pebbles and possibly equates with the Westland Green Member downstream (Hey, 1986). |
| Definition of Lower Boundary: |
none recorded or not applicable
|
| Definition of Upper Boundary: |
none recorded or not applicable
|
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
Valley of the Upper Thames upstream of Oxford. |
| Parent Unit: |
Sudbury Formation (SBRY)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Stag's Plain [SP 326 182], west of Waterman’s Lodge. |
| Reference(s): |
| McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. |
| Hey, R W. 1986. A re-examination of the Northern Drift of Oxfordshire. Proceedings of the Geologists' Association, Vol.97, 291-302. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
