The BGS Lexicon of Named Rock Units — Result Details

Pitlurg Farm Till Formation

Stratotypes:
Computer Code:	PGTI	Preferred Map Code:	PIT
Status Code:	Full
Age range:	Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description:	A very dark to dark grey clayey, silty, pebbly, slightly calcareous, diamicton. Besides local rock types, it includes red (Devonian) sandstone, white, probably Mesozoic, sandstone, and shell fragments.
Definition of Lower Boundary:	Generally unconformable on bedrock or older tills, such as the Bellscamphie Till Formation.
Definition of Upper Boundary:	Generally unconformable with the Hatton Till Formation.
Thickness:	At least 7m
Geographical Limits:	Coastal lowland north of Aberdeen, east of Ellon and south of Peterhead.
Parent Unit:	Banffshire Coast and Caithness Glacigenic Subgroup (BCD)
Previous Name(s):	Indigo boulder clay [Obsolete Name and Code: Use PGTI] (-3611) Pitlurg Farm Till [Obsolete Name and Code: Use PGTI] (-4256)
Alternative Name(s):	none recorded or not applicable
Type Section	Abandoned railway cutting at Bellscamphie, 7km eastnortheast of Ellon. Trial pits in Hall and Jarvis, 1995; boreholes in Merritt, 1981.
Reference(s):
Merritt, J W. 1981. The sand and gravel resources of the country around Ellon, Grampian Region. Description of 1:25 000 resource sheet NJ93 with parts of NJ82, NJ83 and NJ92, NK03 and parts of NK02 and NK13. Mineral assessment Report of the Institute of Geological Sciences, No. 76.
Hall, A M and Jarvis, J. 1995. A multiple till sequence near Ellon, Grampian Region: T F Jamieson's "indigo boulder clay" re-examined. Scottish Journal of Geology, Vol.31, 53-59.
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.
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S097

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