| Computer Code: |
LAGN |
Preferred Map Code: |
LAGN |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Fossiliferous mudstone with well-preserved graptolite fauna obtained from the enclosed lime-rich nodules. |
| Definition of Lower Boundary: |
Succeeds Benan Conglomerate; mudstone abruptly overlies coarse, pebble and boulder conglomerate. |
| Definition of Upper Boundary: |
Succeeded by the Doon Hill Conglomerate Member of the Balclatchie Formation; boundary defined by abrupt overlying pebble conglomerate. |
| Thickness: |
c.100m (estimate). |
| Geographical Limits: |
Girvan area, Scotland. |
| Parent Unit: |
Balclatchie Formation (BCH)
|
| Previous Name(s): |
Limestones in Laggan Burn [Obsolete Name and Code: Use LAGN]
(-4745)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Laggan Burn, c.600m northwest of Dalfask Farm, Girvan. Ingham (in Fortey et al., 2000) |
| Reference(s): |
| Bulman, O M B. 1945-1947. A monograph of the Caradoc (Balclatchie) graptolites from limestones in Laggan Burn, Ayrshire. Parts 1-3, xi + 78pp., 10pls. Monograph of the Palaeontographical Society, London. |
| Fortey, R A, Harper, D A T, Ingham, J K, Owen, A W, Parkes, M A, Rushton, A W A and Woodcock, N H. 2000. A revised correlation of Ordovician rocks in the British Isles. Geological Society Special Report, No.24. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
