| Computer Code: |
THLA |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Arundian Substage (CJ)
— Asbian Substage (CR) |
| Lithological Description: |
The Touch House Lava Member consists only of plagioclase-macrophyric basalt or trachybasalt lavas (basalt to hawaiite of 'Markle' type) and only the lowest part of the member is well exposed, near the edge of the low-lying fertile land between Touch Home Farm [NS 7518 9331] and Touch House [NS 7535 9276]. |
| Definition of Lower Boundary: |
The basal plagioclase-macrophyric basalt lava of the member is apparently conformable, or disconformable, on the underlying plagioclase-microphyric basalt of the Black Mount Lava Member. |
| Definition of Upper Boundary: |
The top of the member is not exposed. |
| Thickness: |
Uncertain |
| Geographical Limits: |
The member is restricted to a small area in the eastern Touch Hills, north-east of Glasgow. These rocks crop out in an outlier which extends northward from Touch House [NS 7535 9276] to near Touch Home Farm [NS 7524 9340] and westwards to north of Mill Linn [NS 9495 9302]. |
| Parent Unit: |
Clyde Plateau Volcanic Formation (CPV)
|
| Previous Name(s): |
Touch House Group [Obsolete Name and Code: Use THLA]
(-4923)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
In the eastern Touch Hills, north-east of Glasgow. Francis et al., 1970. |
| Reference Section |
Exposures between Touch Saw Mill and Touch House, eastern Touch Hills, north-east of Glasgow. Francis et al., 1970. |
| Reference(s): |
| Francis, E H, Forsyth, I H, Read, W A and Armstrong, M. 1970. The geology of the Stirling district. Memoir of the Geological Survey of Great Britain, Sheet 39 (Scotland). |
| Dean, M T, Browne, M A E, Waters, C N and Powell, J H. 2011. A lithostratigraphical framework for the Carboniferous successions of northern Great Britain (onshore). British Geological Survey Research Report, RR/10/007. 165pp. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S039
|
