| Computer Code: |
HMS |
Preferred Map Code: |
HMS |
| Status Code: |
Full |
| Age range: |
Ashgill Series (OA)
— Ashgill Series (OA) |
| Lithological Description: |
Fine- to medium-grained grey sandstone. |
| Definition of Lower Boundary: |
Conformably overlies the South Threave Formation of the DrummuckSubgroup. |
| Definition of Upper Boundary: |
Unconformably overlain by the Mulloch Hill Conglomerate (Silurian). |
| Thickness: |
30m, thinning to zero |
| Geographical Limits: |
Craighead Inlier, Girvan area, southwest Scotland. |
| Parent Unit: |
Drummuck Subgroup (DKG)
|
| Previous Name(s): |
High Mains Sandstone [Obsolete Name and Code: Use HMS]
(-3474)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
High Mains Farm, Craighead Inlier, 10km north-east of Girvan. Sheet SO14W. Harper, 1981. |
| Reference(s): |
| Lamont, A. 1935. The Drummuck Group, Girvan; A stratigraphical revision, with descriptions of new fossils from the lower part of the group. Transactions of the Geological Society of Glasgow, Vol.19, 288-334. |
| Harper, D A T. 1981. The stratigraphy and faunas of the Upper Ordovician High Mains Formation of the Girvan district. Scottish Journal of Geology, Vol.17(4), 247-255. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S014
|
