The BGS Lexicon of Named Rock Units — Result Details
Mearns Glacigenic Subgroup
| Computer Code: | MDR | Preferred Map Code: | MN |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Devensian Stage (QD) — Devensian Stage (QD) | ||
| Lithological Description: | Till, sand and gravel and laminated silt composed principally of decomposed Silurian and Devonian rocks and associated with deposition from glacial ice of the Strathmore ice-stream. | ||
| Definition of Lower Boundary: | Unconformable: base of Mill of Forest Till Formation. | ||
| Definition of Upper Boundary: | Unconformable: top of Drumlithie Sand and Gravel Formation. | ||
| Thickness: | Very variable, generally 5 to 10m, but in excess of 24m proved in boreholes. | ||
| Geographical Limits: | Strathmore, east of Perth and as isolated spreads along the coast between Stonehaven and the mouth of the River Dee. | ||
| Parent Unit: | Caledonia Glacigenic Group (CALI) | ||
| Previous Name(s): | Mearns Drift Group [Obsolete Name and Code: Use MDR]
(-2318)
Red Clay Series [Obsolete Name and Code: Use MDR] (-2319) Red Glacial Drift [Obsolete Name and Code: Use MDR] (-1058) Red Series [Obsolete Name and Code: Use MDR, LBD, MEAG, LBAG] (-1013) Mearns Glacigenic Group [Obsolete Name and Code: Use MDR] (-1687) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | River cliff, 200m downstream (east) of Mill of Forest Farm, Stonehaven. | ||
| Reference Section | 0.1m to 15.1m depth in.BGS borehole NO88NW/13, at Craigie's Wood, Stonehaven. | ||
| Type Area | Howe of Mearns, Kincardineshire. | ||
| Reference(s): | |||
| Synge, F M. 1956. The glaciation of north east Scotland. Scottish Geographical Magazine, Vol.72, 129-143. | |||
| Glentworth, R, Mitchell, W A and Mitchell, D. 1964. The red glacial drift deposits of north east Scotland. Clay Minerals Bulletin, Vol.5, 373-381. | |||
| Hall, A M and Connell, E R. 1991. The glacial deposits of Buchan, northeast Scotland. 129-136 in Ehlers, J, Gibbard, P L and Rose, J (editors), Glacial Deposits in Great Britain and Ireland. (Rotterdam: Balkema.) | |||
| Jamieson, T F. 1906. The glacial period in Aberdeenshire and the southern border of the Moray Firth. Quarterly Journal of the Geological Society of London, Vol.62, 13-39. | |||
| Simpson, S. 1948. The glacial deposits of Tullos and Bay of Nigg, Aberdeen. Transactions of the Royal Society of Edinburgh, Vol.61, 687-697. | |||
| Merritt, J W, Auton, C A, Connell, E R, Hall, A M and Peacock, J D. 2003. The Cainozoic geology and landscape evolution of north-east Scotland. Memoir of the British Geological Survey, Sheets 66E, 67, 76E, 77, 86E, 87W, 87E, 95, 96W, 96E and 97 (Scotland) | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S066 S067 S066 S066 | |||