The BGS Lexicon of Named Rock Units — Result Details
Roding Silt Member
Computer Code: | ROSI | Preferred Map Code: | SYMB |
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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.) | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E257 |