| Computer Code: |
DNV |
Preferred Map Code: |
DNV |
| Status Code: |
Full |
| Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
| Lithological Description: |
Mainly andesitic and basaltic lavas, commonly amygdaloidal, including olivine basalts, pyroxene andesites and feldsparphyric lavas with subordinate volcanic breccias, tuffs and minor sandstone interbeds. |
| Definition of Lower Boundary: |
The base of the volcanic rocks seen in the Duneaton Water above the sandstones of the Swanshaw Sandstone Formation. |
| Definition of Upper Boundary: |
The top of the pile of volcanic rocks seen in the Duneaton Water below the Auchtitench Sandstone Formation rudites and arenites. |
| Thickness: |
Estimated to be from 440m in the reference section in the Duneaton Water tributary to at least 1200 m thick. |
| Geographical Limits: |
Between the Ayrshire and Douglas Carboniferous basins, Ayrshire and Lanarkshire, Scotland, |
| Parent Unit: |
Lanark Group (LNK)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Partial Type Section |
Upper part along Duneaton Water, from the fault at NS 7623 2267 to the top, 150m N 45 degrees W of the junction of Bain's Burn with Duneaton Water. |
| Partial Type Section |
Lower part along Duneaton Water, from the base 60m west of the entry of Black Burn at NS 7479 2341, up to the major fault exposed in Duneaton Water at NS 7623 2267, 300m east of the junction of Laird's Burn. |
| Reference Section |
A tributary to Duneaton Water, from the base in the stream 490m N 24 degrees E of Auchendaff to the top in the stream 490m N 78 degrees E of Auchendaff. |
| 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. |
| Smith, R A. 1994. Geological notes and local details for 1:10 000 sheet, NS72SW. British Geological Survey Technical Report, WA/94/9. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S008
S015
S023
S008
S015
S022
|
