| Computer Code: |
DABLS |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Coniacian Age (KO)
— Coniacian Age (KO) |
| Lithological Description: |
The Dab Limestone Unit consists of white, light grey, brown, cream to buff, firm to hard, fine- to medium-grained, glauconitic, pyritic, silty and sandy limestones with thin interbeds of light to dark grey, firm to hard, calcareous, micromicaceous and carbonaceous mudstone. |
| Definition of Lower Boundary: |
In the West Shetland Basin, the Whiting Sandstone Unit (e.g. 206/10a-l) and the Dab Limestone Unit (e.g. 206/8-4) rest unconformably on the Clair Group and Victory Formation, respectively. |
| Definition of Upper Boundary: |
On wireline logs the top of the unit is represented by a marked downward decrease in the gamma-ray log values and an increase in the velocity as Kyrre Formation mudstones grade to Dab Limestone Unit limestones and mudstones. |
| Thickness: |
none recorded or not applicable
|
| Geographical Limits: |
Restricted to the northern part of the West Shetland Basin. |
| Parent Unit: |
Kyrre Formation (KYRE)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
North Sea well 206/08- 4: 1954-2001 m (6411-6565 ft) (Ritchie et al., 1996). |
| Reference(s): |
| Ritchie, J D, Gatliff, R W and Riding, J, 1996. 1. Pre - Tertiary lithostratigraphy. In: Stratigraphic Nomenclature of the UK North West Margin. British Geological Survey, Nottingham. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
