| Computer Code: |
CLOCL |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
| Lithological Description: |
Silty clay with sparse well rounded, high sphericity pebbles of psammite and quartzite, containing in situ high-boreal shells/microfauna. |
| Definition of Lower Boundary: |
Sharp, unconformable contact with Drummore Gravel Formation below. |
| Definition of Upper Boundary: |
Gradational contact, generally marked by colour change (olive-grey to pale yellowish-brown), with the Dalroy Sand Member above. |
| Thickness: |
4.9m at type section |
| Geographical Limits: |
Sheet NH74SE. |
| Parent Unit: |
Clava Shelly Formation (CLSH)
|
| Previous Name(s): |
Clava Shelly Clay Member [Obsolete Name And Code: Use CLOCL]
(CSCL)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Lectostratotype (after Horne et al, 1894; combined ' Main Pit' section and boreholes 1 and 3). River cliff section of Cassie Burn. Section NH74SE E5 on 'standard' map. |
| Reference(s): |
| 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. |
| Fletcher, T P et al. 1996. Geology of the Fortrose and eastern Inverness district. Memoir of the British Geological Survey, Sheet 84W (Scotland). |
| 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. |
| 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. |
| McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S084
|
