| Computer Code: |
PASA |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Kimmeridgian Age (JD)
— Kimmeridgian Age (JD) |
| Lithological Description: |
Thinly bedded, pale to medium grey-brown, fine- to medium-grained, quartzose, variably dolomitic and moderately sorted sandstones. Interbedded dark grey mudstones present. Wire-line log responses are erratic. |
| Definition of Lower Boundary: |
The base is defined by a down-section change from sandstone with interbedded mudstone to dominantly mudstone (Kimmeridge Clay Formation). There is a change from the erratic wireline log responses to a more uniform response. |
| Definition of Upper Boundary: |
The top is defined by a down-section change from mudstone (Kimmeridge Clay Formation) to sandstone with interbedded mudstone. The boundary is marked by a down-section decrease in gamma-ray values and an increase in velocity. |
| Thickness: |
Up to c. 150 m. |
| Geographical Limits: |
The member is restricted to the area around the Magnus Field (Quadrant 211/12 in the northern part of the East Shetland Basin). |
| Parent Unit: |
Kimmeridge Clay Formation (KC)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
North Sea well 211/12- 5 between the depths 3261 and 3295 m below KB (Richards et al., 1993). |
| Reference(s): |
| Richards, P C, Lott, G K, Johnson, H, Knox, R W O'B. and Riding, J B. 1993. 3. Jurassic of the Central and Northern North Sea. In: Knox, R W O'B and Cordey, W G (eds.). Lithostratigraphic nomenclature of the UK North Sea. British Geological Survey, Nottingham. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
