The BGS Lexicon of Named Rock Units — Result Details
Roding Silt Member
| Computer Code: | ROSI | Preferred Map Code: | SYMB |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Devensian Stage (QD) — Holocene Epoch (QH) | ||
| Lithological Description: | Varies from silt to clay, commonly yellow-brown and massively bedded. [Generic description]. | ||
| Definition of Lower Boundary: | Rests on Kempton Park Gravel river terrace deposit and older bedrock strata. | ||
| Definition of Upper Boundary: | At surface, and may be overlain by alluvium. | ||
| Thickness: | Typically 2-3m | ||
| Geographical Limits: | Thames Valley, restricted to River Roding tributary valley from South Woodford, upstream to Passingford Bridge. May be present farther upstream but none mapped; lateral limits are limits of deposition. | ||
| Parent Unit: | Maidenhead Formation (MNHD) | ||
| Previous Name(s): | Roding Silt Formation
(-501)
Brickearth (BRK) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Road cutting alongside North Circular Road (Southend Road). | ||
| Reference(s): | |||
| British Geological Survey. 1992. Sheet TQ49SW (Woodford Green) Solid and Drift Edition, 1:10 000. (Keyworth, Nottingham: British Geological Survey.) | |||
| 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. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E257 | |||