The BGS Lexicon of Named Rock Units — Result Details
Hackney Gravel Member
| Computer Code: | HAGR | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Wolstonian Stage (QO) — Wolstonian Stage (QO) | ||
| Lithological Description: | Sand and gravel, locally with lenses of silt, clay or peat. [Generic description]. | ||
| Definition of Lower Boundary: | Rests with unconformity on bedrock geology (eg London Clay). | ||
| Definition of Upper Boundary: | At surface. | ||
| Thickness: | Average 6m, range to 10m. | ||
| Geographical Limits: | Thames Valley and associated tributaries. | ||
| Parent Unit: | Maidenhead Formation (MNHD) | ||
| Previous Name(s): | Hackney Gravel Formation [Obsolete Name and Code: Use HAGR]
(-303)
Terrace 3a [Obsolete Name and Code: Use HAGR] (-3452) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Hackney Downs. | ||
| 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. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E256 E257 | |||