The BGS Lexicon of Named Rock Units — Result Details
Langley Silt Member
| Computer Code: | LASI | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Devensian Stage (QD) — Devensian Stage (QD) | ||
| Lithological Description: | Varies from silt to clay, commonly yellow-brown and massively bedded. [Generic description]. | ||
| Definition of Lower Boundary: | Rests on sand and gravel River Terrace Deposits, with sharp base. | ||
| Definition of Upper Boundary: | At surface. | ||
| Thickness: | 1-5m, average 3m. | ||
| Geographical Limits: | Thames Valley from Goring to Thames Estuary. | ||
| Parent Unit: | Maidenhead Formation (MNHD) | ||
| Previous Name(s): | Langley Silt Formation [Obsolete Name and Code: Use LASI]
(-2889)
Brickearth (BRK) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Gravel pit at Langley, Berks. | ||
| Reference(s): | |||
| Strange, P J. 1992. A new nomenclature for the River Terrace Deposits of North London. British Geological Survey Technical Report, WA/92/52. | |||
| Gibbard, P L, 1985. Pleistocene history of the Middle Thames Valley. (London: Cambridge University Press.) | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E256 E268 E269 | |||