The BGS Lexicon of Named Rock Units — Result Details
Whisby Farm Sand and Gravel Member
Computer Code: | WFSG | Preferred Map Code: | notEntered |
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Status Code: | Full | ||
Age range: | Mid Pleistocene (QPM) — Mid Pleistocene (QPM) | ||
Lithological Description: | Reddened sands and gravels dominated by rounded pebbles of "Bunter" quartz/quartzite with subordinate subangular flint. Underlies possible terrace remnants adjacent to the outcrop of the Balderton Sand and Gravel and with a terrace surface standing typically c.4 to 5m above the Balderton Terrace. Upper part locally includes a thin fluvio-aeolian coversand (Whisby Sand Bed, pre-Ipswichian) and rubified palaeosol (Hykeham Soil; Ipswichian). Tentatively correlated with the Etwall Sand and Gravel Member (Trent Valley Formation). | ||
Definition of Lower Boundary: | Unconformable, commonly channelled base, resting on pre-Quaternary bedrock (at type locality). | ||
Definition of Upper Boundary: | Ground surface. | ||
Thickness: | 0 to c. 3 m. | ||
Geographical Limits: | Currently only known around the Type locality but likely to be more widepsread flanking the Balderton Terrace between Newark-on-Trent and the Lincoln Gap (see Brandon and Sumbler, 1991, Fig.1) and perhaps elsewhere (BGS sheets 114, ?126). | ||
Parent Unit: | Trent Valley Formation (TRVA) | ||
Previous Name(s): | Older river sand and gravel
(ORSG)
Older river sand and gravel (ORSG) Whisby Farm Member [Obsolete Name and Code: Use WFSG] (-1913) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Section | Whisby Pit, near Thorpe on the Hill, Lincoln. Brandon and Sumbler in Bowen, 1999; Brandon and Sumbler, 1991, Fig.3; Brandon, ms notes. | ||
Reference(s): | |||
Stoker, M S, McMillan, A A and Waters, C N. Quaternary Stratigraphical Chart: Southern Britain. British Geological Survey, 1 poster. | |||
Howard, A J. 1992. The Quaternary Geology and geomorphology of the area between Newark and Lincoln. Unpublished PhD Thesis, University of Derby. | |||
Brandon A and Sumbler, M G. 1991. The Balderton Sand and Gravel: pre-Ipswichian cold stage fluvial deposits near Lincoln, England. Journal of Quaternary Science, Vol.6. 117-138. | |||
Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E114 |