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
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Alternative Name(s): |
none recorded or not applicable
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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): |
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. |
Browne, M A E, Smith, R A and Aitken, A M. 2001. A lithostratigraphical framework for the Devonian (Old Red Sandstone) rocks of Scotland south of a line from Fort William to Aberdeen. Version 3. British Geological Survey Research Report RR/01/04. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S038
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