| Computer Code: |
JBL |
Preferred Map Code: |
JBL |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Calcareous silty mudstone containing a brachiopod and trilobite fauna; carbonate content concentrated in bands. |
| Definition of Lower Boundary: |
Succeeds the 15cm calcareous sandstone (the Separation Sandstone Bed) that separates the Jubilation Member from the underlying poorly-bedded mudstone with decalcified limestone nodules of the Gorse Member of the Doularg Formation. |
| Definition of Upper Boundary: |
Faulted. |
| Thickness: |
At least 13m |
| Geographical Limits: |
Girvan area, southwest Scotland. |
| Parent Unit: |
Doularg Formation (DOUL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Plantation Burn, Doularg Hill, c.1km eastnortheast of Doularg Farm. Ingham and Tripp, 1991. |
| Reference(s): |
| Ingham, J K and Tripp, R P. 1991. The trilobite fauna of the Middle Ordovician Doularg Formation of the Girvan district, Scotland and its palaeoenvironmental significance. Transactions of the Royal Society of Edinburgh, Vol.82 (1), p. 27 - 54. |
| Tripp, R P. 1965. Trilobites from the Albany division (Ordovician) of the Girvan district, Ayrshire. Palaeontology, Vol.8, 577-603. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
