| Computer Code: |
ASV |
Preferred Map Code: |
ASV |
| Status Code: |
Full |
| Age range: |
Chadian Substage (CI)
— Arundian Substage (CJ) |
| Lithological Description: |
The predominant rock types are basaltic lavas and tuffs and mugearite lavas; subordinate interbedded sedimentary rocks also occur. |
| Definition of Lower Boundary: |
Base of volcanic rocks on sedimentary rocks of Inverclyde Group (Ballagan Formation). |
| Definition of Upper Boundary: |
Top of volcanic rocks below sedimentary rocks of Gullane Formation. |
| Thickness: |
c.300m |
| Geographical Limits: |
Mainly conjectural; thins in all directions. |
| Parent Unit: |
Strathclyde Group (SYG)
|
| Previous Name(s): |
Arthur's Seat Volcanic Rocks [Obsolete Name and Code: Use ASV]
(-3180)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Natural exposures in Holyrood Park. |
| Reference(s): |
| Chisholm, J I, MacAdam, A D, and Brand, P J. 1989. Lithostratigraphical classification of Upper Devonian and Lower Carboniferous rocks in the Lothians. British Geological Survey Technical Report WA/89/26. |
| Mitchell, G H. 1962. The geology of the neighbourhood of Edinburgh. (Explanation of Sheet 32) Third Edition. (Reprinted 1980). Memoir of the Geological Survey of Great Britain (Scotland). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S032
S032
S032
|
