Computer Code: |
CRKV |
Preferred Map Code: |
CRKV |
Status Code: |
Full |
Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
Lithological Description: |
A volcanic succession of basalt and basaltic andesite sheets and flows with subordinate volcaniclastic and epiclastic sandstones and conglomerates. |
Definition of Lower Boundary: |
Marked by basalts and basaltic andesites conformably above the predominantly sandstone succession of the Swanshaw Sandstone Formation. |
Definition of Upper Boundary: |
The unconformable junction with the Upper Devonian Stratheden Group. |
Thickness: |
About 600m |
Geographical Limits: |
South and Central Ayrshire, Scotland. Farther east, the volcanic pile near Cumnock is attributed to the Duneaton Volcanic Formation. |
Parent Unit: |
Lanark Group (LNK)
|
Previous Name(s): |
Volcanic 'Group' of the Lower Old Red Sandstone [Obsolete Name and Code: Use CRKV]
(-3326)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Partial Type Section |
The foreshore from west of Drumshang at NS 2449 1382 to Bracken Bay at NS 2730 1820. |
Reference(s): |
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. |
Eyles, V A, Simpson, J B and Macgregor, M C. 1949. Geology of Central Ayrshire. Memoir of the Geological Survey of Scotland, British Geological Survey, Sheet 14 (Scotland). |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S014
S014
S008
S008
|