| Computer Code: |
BALH |
Preferred Map Code: |
BAL |
| Status Code: |
Full |
| Age range: |
Lochkovian Age (DO)
— Lochkovian Age (DO) |
| Lithological Description: |
A fine- to medium-grained, commonly vesicular and amygdaloidal olivine basalt. |
| Definition of Lower Boundary: |
A conformable contact with medium-grained sublithic sandstone of the Bofrishlie Burn Sandstone Member. |
| Definition of Upper Boundary: |
Not seen, but quartz and quartzite conglomerate of the parent Craig of Monievreckie Conglomerate Formation, in close proximity above. |
| Thickness: |
Approximately 30 m thick. |
| Geographical Limits: |
The north-west limb of Strathmore Syncline between Maol Ruadh and Balleich in Queen Elizabeth Forest Park. |
| Parent Unit: |
Craig of Monievreckie Conglomerate Formation (CMVC)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
North-west flank of Drum of Clashmore, near Aberfoyle. |
| Type Section |
Small bluff at Balleich, near Aberfoyle. |
| Reference Section |
Hillock at Dunandry, near Aberfoyle. |
| Reference(s): |
| Browne, M A E, Smith, R A, and Aitken, A M. 2002. Stratigraphical framework for the Devonian (Old Red Sandstone) rocks of Scotland south of a line from Fort William to Aberdeen. British Geological Survey Research Report RR/01/04. 67 pp. |
| Phillips, E R, and Aitken, A M. 1998. The petrology and composition of the Lower Old Red Sandstone exposed in the Aberfoyle Area (Sheet 38E), Central Scotland. British Geological Survey, Technical Report, WG/98/10. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S038
|
