| Computer Code: |
WESS |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Selandian Age (GS)
— Selandian Age (GS) |
| Lithological Description: |
The Westerhouse Sandstone Member consists of a succession of discrete sandstone and mudstone units, producing a distinctly serrated appearance on wireline logs. Bed thicknesses as recorded on wireline logs are mostly between one and five metres thick, but reach 10 to 15 m thick in some instances. A cored section from the middle of the Westerhouse Member in well 214/27-2 shows a succession of mostly medium grained, well sorted, pale grey to grey-green sandstones separated by thin, grey claystones, silty micaceous mudstones and siltstones. The sandstones display little internal structure, but show crude vertical normal grading within the sand fraction and concentrations of mudstone clasts in the upper part of some units. The sandstones display varying degrees of cementation by calcite, reflected in the spiky sonic log signature. |
| 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: |
none recorded or not applicable
|
| Parent Unit: |
Lamba Formation (LMBA)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
North Sea well 214/27- 2: 2943-3346 m (9655-10978 ft) (Knox et al., 1997). |
| Reference Section |
North Sea well 214/28- 1: 3128-3372 m (10262-11063 ft) (Knox et al., 1997). |
| Reference(s): |
| Mitchell, S M, Beamish, G W J, Wood, M V, Malacek, S J, Armentrout, M J, Damuth, J E, and Olson, H C. 1992. Paleogene sequence stratigraphic framework of the Faroe Basin. In: Parker, J R (ed.) Petroleum geology of Northwest Europe: proceedings of the 4th conference, 1011-1023. The Geological Society, London. |
| Knox, R W O'B, Holloway, S, Kirby, G A and Baily, H E. 1997. Stratigraphic nomenclature of the UK North West Margin. 2. Early Paleogene lithostratigraphy and sequence stratigraphy. British Geological Survey, Nottingham. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
