| Computer Code: |
GHV |
Preferred Map Code: |
GHV |
| Status Code: |
Full |
| Age range: |
Visean Age (CV)
— Visean Age (CV) |
| Lithological Description: |
Basaltic and trachytic lavas and tuffs predominate; but subordinate volcanic-derived sedimentary rocks also occur. |
| Definition of Lower Boundary: |
Base of volcanic rocks resting on sedimentary rocks of Inverclyde Group (Ballagan Formation). |
| Definition of Upper Boundary: |
Top of volcanic rocks below sedimentary rocks of Gullane Formation. |
| Thickness: |
380m in Garleton Hills (240m at North Berwick; 257m in Spilmersford Borehole). |
| Geographical Limits: |
Little known; thins in all directions. |
| Parent Unit: |
Strathclyde Group (SYG)
|
| Previous Name(s): |
Garleton Hills Volcanic Rocks
(-930)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Garleton Hills. |
| Reference(s): |
| McAdam, A D and Tulloch, W, 1985. Geology of the Haddington district. Memoir of the Geological Survey, sheet 33W (Scotland). |
| Chisholm, J I, MacAdam, A D, Brand, P J. 1989. Lithostratigraphical classification of Upper Devonian and Lower Carboniferous rocks in the Lothians. British Geological Survey Technical Report, WA/89/26. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S033
S033
S041
|
