The BGS Lexicon of Named Rock Units — Result Details

Happisburgh Sand Member
Computer Code: HPSA Preferred Map Code: notEntered
Status Code: Full
Age range: Pleistocene Epoch (QP) — Pleistocene Epoch (QP)
Lithological Description: The Happisburgh Sand Member consists of yellowish brown and yellow-orange stratrified sands. The sands exhibit a range of bedding structures including planar and trough cross-bedding, ripples, horizontal bedding, channel structures and sporadic horizons of convolute bedding.
Definition of Lower Boundary: The transition from the laminated silts and clays of the Ostend Clay Member (also part of the Happisburgh Formation) to the sandy facies of the Happisburgh Sand Member is erosional and marked by a thin gravel lag.
Definition of Upper Boundary: The transition from the sandy Happisburgh Sand Member to the diamicton facies of the Corton Till Member is erosional.
Thickness: Varies between 6 and 8m
Geographical Limits: Cliffs sections between Happisburgh Coastguard Station and Happisburgh lighthouse, northeast Norfolk.
Parent Unit: Happisburgh Glacigenic Formation (HPGL)
Previous Name(s): Intermediate Beds (-4712)
Happisburgh Sands (-963)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  The stratotype for the Happisburgh Sand Member is the coastal cliffs 500m east of Happisburgh lighthouse, Norfolk. At this locality the sands can be seen overlying the Happisburgh Till Member and Ostend Clay Member. Lunkka, 1994. 
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. 
Banham, P H. 1968. A preliminary note of the Pleistocene stratigraphy of northeast Norfolk. Proceedings of the Geologists' Association, Vol.79, 469-474. 
Lunkka, J P, 1994. Sedimentation and lithostratigraphy of the North Sea Drift and Lowestoft Till Formations in the coastal cliffs of northeast Norfolk, England. Journal of Quaternary Science, 9, 209-233. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable
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