| Computer Code: |
BNSS |
Preferred Map Code: |
MIHO |
| Status Code: |
Index Level |
| Age range: |
Brigantian Substage (CX)
— Brigantian Substage (CX) |
| Lithological Description: |
[Obsolete: use MIHO] A grey to brownish grey, fine-grained limestone, somewhat dolomitic, slightly bioclastic, crinoidal, interpreted to be of marine origin, with Zoophycus caudagalli trace fossil common. |
| Definition of Lower Boundary: |
Generally a conformable change from the rooted top of a c.10m-thick sandstone within the Lower Limestone Formation that directly overlies the Chapel Point Limestone (now the Main Hosie Limestone). |
| Definition of Upper Boundary: |
Generally apparently conformable change to pale reddish brown, cross-bedded, medium-grained sandstone within the Lower Limestone Formation. Because of erosion, higher strata in the Lower Limestone Formation are not known in this area. |
| Thickness: |
Generally to 0.3m, but seen as 1.8m in East Lothian, although may be locally absent. |
| Geographical Limits: |
In East Lothian, in the Barns Ness area near Dunbar. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
Barns Ness East Limestone
|
| Stratotypes: |
| Reference Section |
Barns Ness Lighthouse, East Lothian. |
| Reference(s): |
| Davies, A, McAdam, A D, and Cameron, I B. 1986. Geology of the Dunbar district. Memoir of the British Geological Survey, Sheet 33E and part of Sheet 41 (Scotland). |
| Browne, M A E, Dean, M T, Hall, I H S, McAdam, A D Monro, S K, and Chisholm, J I. 1999. A lithostratigraphical framework for the Carboniferous rocks in the Midland Valley of Scotland. British Geological Survey Research Report RR/99/07. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S033
|
