The BGS Lexicon of Named Rock Units — Result Details
Peterlee Sand And Gravel Formation
| Computer Code: | PESG | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Devensian Stage (QD) — Devensian Stage (QD) | ||
| Lithological Description: | Typically comprises a unit of horizontally bedded, red, fine-grained sand with beds of silt, clay, coarse sand and fine gravel, overlain by a more laterally extensive unit of gravel, coarseing upwards and locally cemented. Beds of red and grey diamicton may occur throughout, representing intercalation with underlying and overlying tills. Clasts are mainly limestone and dolostone from the upper divisions of the Zechstein Group (fprmerly Magnesian Limestone), together with Carboniferous lithologies, Cheviot andesite and sparse shell fragments. | ||
| Definition of Lower Boundary: | Generally sharp, erosional and forming broad depressions on underlying dark grey, stony silty sandy clay diamicton of the Blackhall Till Formation. Lower unit mainly restricted to depressions whereas the upper unit commonly oversteps directly onto the Blackhall Till Formation. | ||
| Definition of Upper Boundary: | Generally planar, subhorizontal contact with overlying dark brown to purplish brown, stony silty sandy clay diamicton of the Horden Till Formation. Contacts may be sharp or gradational with glacitectonic intercalation. | ||
| Thickness: | To 22m | ||
| Geographical Limits: | Coast of County Durham and southern Northumberland. | ||
| Parent Unit: | North Sea Coast Glacigenic Subgroup (NSG) | ||
| Previous Name(s): | Peterlee Member [Obsolete Name and Code: Use PESG]
(*324)
Peterlee Sands [Obsolete Name and Code: Use PESG] (-1116) Middle Sands [Obsolete Name and Code: Use PESG, STPTG] (-4253) |
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| Alternative Name(s): | Peterlee Member [Obsolete: use PESG] |
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| Stratotypes: | |||
| Type Section | 250m cliff sections in the vicinity of Warren House Gill, 500-750m south of Horden Point. Smith and Francis, 1967. | ||
| Reference(s): | |||
| Francis, E A. 1970. Quaternary. 134-152 in Johnson, G A L, Geology of Durham County. [Newcastle: Natural History Society of Northumberland, Durham and Newcastle-upon-Tyne.] 152pp. | |||
| Smith, D B and Francis, E A. 1967. Geology of the country between Durham and West Hartlepool. Memoir of the Geological Survey of Great Britain, Sheet 27 (England and Wales). | |||
| Bridgland, D R, Horton, B P, and Innes, J B. 1999. The Quaternary of northeast England. Field Guide. Quaternary Research Assocation, London. | |||
| Thomas, G S P. 1999. Northern England. 91-98 in Bowen, D Q (Editor), A revised correlation of Quaternary and Neogene deposits in the British Isles. Geological Society Special Report No.23. | |||
| Huddart, D. 2002. Warren House Gill. 51-56 in Huddart, D and Glasser, N F (editors), Quaternary of Northern England. Geological Conservation Review Series, No.25. [Peterborough: Joint Nature Conservation Committee.] 745pp. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| none recorded or not applicable | |||