The BGS Lexicon of Named Rock Units — Result Details

Beacon Hill Sand And Gravel Member

Computer Code: BHIL Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Pleistocene Epoch (QP)
Lithological Description: The Beacon Hill Sand and Gravel Member consists of shelly, cross-bedded and rippled sands with flint-rich gravel seams and sporadic intraformational ice wedge casts and drop-soil structures (periglacial involutions). The lower horizons of the deposits are intensely glaciotectonized.
Definition of Lower Boundary: The lower boundary of Beacon Hill Sand and Gravel is erosional throughout much of the deposit's distribution area and it generally rests upon the Bacton Green Till Member of the Sheringham Cliffs Formation. In places, especially in the vicinity of Trimingham and Gimingham, the lower boundary is tectonic and wedges of Bacton Green Till have been thrust upwards into the deposit.
Definition of Upper Boundary: Where the Beacon Hill Sand and Gravel has been observed, it forms the highest stratigraphical unit within the succession intersecting the ground surface.
Thickness: To approximately 12m
Geographical Limits: Coastal sections between Marl Point Mundesley [TG 2922383] and Trimingham [TG 283388], north Norfolk, and adjacent elevated ground inland between the coast and Gimingham.
Parent Unit: Briton's Lane Formation (BRLA)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  The stratotype section is within a small sand pit called Gimingham Quarry, situated southeast of the northeast Norfolk village of Trimingham, and 500m west of Beacon Hill. At this locality, the deposit consists of approximately 12m of stratified sand with sporadic seams of flint-rich gravel. Thin slabs of Bacton Green Till Member and Weybourne Town Till Member have been thrust into the basal horizons of the sands. Lee et al., 2004. 
Reference(s):
Lee, J R, Booth, S J, Hamblin, R J O, Jarrow, A M, Kessler, H, Moorlock, B S P, Morigi, A N, Palmer, A, Riding, J B and Rose, J. 2004. A new stratigraphy for the glacial deposits around Lowestoft, Great Yarmouth, North Walsingham and Cromer, East Anglia, UK. Bulletin of the Geological Society of Norfolk, Vol.53, 3-60. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable