| Computer Code: |
CHAV |
Preferred Map Code: |
CHAV |
| Status Code: |
Full |
| Age range: |
Silurian Period (S)
— Early Devonian Epoch (DL) |
| Lithological Description: |
A massive, mainly clast-supported conglomerate, of 'Highland provenance, with lenses of horizontally-laminated, medium-grained sandstone. |
| Definition of Lower Boundary: |
Overlies the Strathlethan Sandstone Member. |
| Definition of Upper Boundary: |
The base of the lowest lava flow in the Tremuda Bay Volcanic Formation. |
| Thickness: |
1980 m thick (Carroll, 1995). |
| Geographical Limits: |
The Stonehaven area. |
| Parent Unit: |
Dunnottar Castle Conglomerate Formation (DRCC)
|
| Previous Name(s): |
Dunnottar Castle Formation
(-775)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Coastal section from the south side of Strathlethan Bay, south to Strabandra nap. Carroll, 1995; Browne et al., 2001. |
| 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. |
| Carroll, S. 1994. Geology of the Stonehaven District. 1:10 000 Sheets NO88NW, NO88NE, NO88SW and NO88SE. British Geological Survey Technical Report WA/94/19. |
| Armstrong, M. 1977. The Old Red Sandstone of Easter Ross and the Black Isle. In Gill, G (editor). The Moray Firth area - geological studies. Inverness Field Club. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S067
|
