Computer Code: |
DROY |
Preferred Map Code: |
DLS |
Status Code: |
Full |
Age range: |
Devensian Stage (QD)
— Devensian Stage (QD) |
Lithological Description: |
Silty fine- to medium-grained, micaceous sand, containing graded beds and sparse drop-stones. Typically glacitectonised. |
Definition of Lower Boundary: |
Gradational, at colour change, (pale yellowish brown to olive grey) with Clava Lodge Clay Member, or glacitectonic boundary with Culdoich Till Member. |
Definition of Upper Boundary: |
Sharp, unconformable, glacitectonic boundary with Finglack Till Formation. |
Thickness: |
6.1m at type section, 4.2m at section NH74SE E9 |
Geographical Limits: |
Sheet NH74SE. |
Parent Unit: |
Clava Shelly Formation (CLSH)
|
Previous Name(s): |
Clava Sand Member [Obsolete Name And Code: Use DROY]
(CLSA)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Reference Section |
Lectostratotype (Peacock, 1975). (Dalroy Sand and Culdoich Till members only). River cliff section of Cassie Burn. Section NH74SE E9 on 'standard' map. |
Type Section |
Lectostratotype (Horne et al, 1894;'Main Pit'), type section and borehole information. Established informally in Merritt (1990). Section in former clay pit by Cassie Burn; boreholes (1) and (3) of Horne et al, (1894). Section NH74SE E5 'standard' map. |
Reference(s): |
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, 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. |
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. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S084
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