The BGS Lexicon of Named Rock Units — Result Details
Silchester Gravel Member
| Computer Code: | SIGR | Preferred Map Code: | symb |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Anglian Stage (QA) — Anglian Stage (QA) | ||
| Lithological Description: | Represents the deposits of the sixth terrace of the Kennet valley on BGS maps. Gravel, variably clayey and sandy. | ||
| Definition of Lower Boundary: | Erosional contact on Cretaceous-Tertiary bedrock. | ||
| Definition of Upper Boundary: | Terrace surface around Silchester, Sulhampstead and correlatives. | ||
| Thickness: | Up to 8 m of gravel underlie the terrace surface around Silchester. | ||
| Geographical Limits: | Kennet Basin. | ||
| Parent Unit: | Kennet Valley Formation (KNTV) | ||
| Previous Name(s): | Plateau Gravel
(PLG)
Silchester Gravel [Obsolete Name and Code: Use SIGR] (-1182) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Kennet Drainage Basin and interfluves between Newbury and Reading (Aldiss et al., 2006). | ||
| Reference(s): | |||
| Gibbard, P L. 1982. Terrace stratigraphy and drainage history of the Plateau Gravels of north Surrey, south Berkshire, and north Hampshire, England. Proceedings of the Geologists' Association, Vol.93, 369-384. | |||
| Bridgland, D R. 1994. Quaternary of the Thames. Geological Conservation Review Series No.7. (Peterborough: Joint Nature Conservation Committee.) | |||
| 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. | |||
| Aldiss, D T, Newell, A J, Smith, N J P, and Woods, M A. 2006. Geology of the Newbury district. Sheet Explanation of the British Geological Survey. Sheet 267 (England and Wales). | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E268 | |||