The BGS Lexicon of Named Rock Units — Result Details

Whisby Farm Sand And Gravel Member

Computer Code: WFSG Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Pleistocene Epoch (QP)
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.3m
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)
Whisby Farm Member (-1913)
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):
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. 
Howard, A J. 1992. The Quaternary Geology and geomorphology of the area between Newark and Lincoln. Unpublished PhD Thesis, University of Derby. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E114