| Computer Code: |
CLSH |
Preferred Map Code: |
ClSh |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Diamicton, olive-grey, very stiff, fissile, with sparse shell material and silty sand. See also details of the Dalroy Sand (DROY), Clava Lodge Clay (CLOCL) and Culdoich Till (CUTI) members. |
| Definition of Lower Boundary: |
Unconformable, glacitectonic boundary of the Clava Lodge Clay Member of the Clava Shelly Formation with the Drummore Gravel Formation below. |
| Definition of Upper Boundary: |
Unconformable, glacitectonic boundary with Finglack Till Formation above. |
| Thickness: |
11m at type section |
| Geographical Limits: |
Sheet NH74SE. |
| Parent Unit: |
Banffshire Coast and Caithness Glacigenic Subgroup (BCD)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
River cliff section of Cassie Burn. Section NH74SE E9 on 'standard' map. Lectostratotype (Peacock, 1975). Dalroy (formerly Clava) Sand and Culdoich (formerly Clava) Shelly Till members only. |
| Type Section |
Section in former clay pit by Cassie Burn; boreholes (1) and (3) of Horne et al, (1894). Section NH74SE E5 'standard' map. Lectostratotype (Horne et al, 1894;'Main Pit'), type section and borehole information. Established informally in Merritt (1990). |
| Reference(s): |
| Merritt, J W, 1990. The lithostratigraphy at Clava, Inverness-shire and a new model for the origin of its shell-bearing deposits as glacially-transported allochthons. "In" Auton, C A, Firth, C R and Merritt, J W. (Editors). Beauly to Nairn: Field Guide. Quaternary Research Association, Cambridge. |
| Horne, J and others, 1894. The character of the high-level shell-bearing deposits at Clava, Chapelhall and other localities. Report of the British Association for the Advancement of Science for 1883, p.483-514. |
| Peacock, J D, 1975. Depositional environment of glacial deposits at Clava, north-east Scotland. Bulletin of the Geological Survey of Great Britain, No.49. 31-37. |
| Merritt, J W 1992. The high-level marine shell-bearing deposits of Clava, Inverness-shire, and their origin as glacial rafts. Quaternary Science Reviews, Vol.11, 759-777. |
| Fletcher, T P et al. 1996. Geology of the Fortrose and eastern Inverness district. Memoir of the British Geological Survey, Sheet 84W (Scotland). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S084
|
