The BGS Lexicon of Named Rock Units — Result Details

Cann Sand Member

Computer Code: CANS Preferred Map Code: CanS
Status Code: Full
Age range: Albian Age (KA) — Albian Age (KA)
Lithological Description: Sand, fine-grained, glauconitic, micaceous with fine lenses or bioturbated laminae of micaceous, very fine-grained sand and silt.
Definition of Lower Boundary: The lower boundary is marked by the sharp contact at the incoming of fine-grained glauconitic sand above the dark grey sandy clay of the Gault Formation. Base commonly marked by a spring line.
Definition of Upper Boundary: The upper boundary is not commonly observed and is probably gradational with an upwards decrease in silt- and clay-grade material and mica up into fine- to medium-grained glauconitic partially cemented sands. In field surveying terms the boundary is a well-marked feature break, presumably coinciding with incoming of cemented sandstone in the overlying Shaftesbury Sandstone.
Thickness: 16 to 30m.
Geographical Limits: Outcrops in Dorset and Wiltshire including the Frome (281), Devizes (282, western part only), Wincanton (297), Salisbury (298), Shaftesbury (313), Bridport (327), Dorchester (328), and West Fleet and Weymouth (341 and 342) sheet areas.
Parent Unit: Upper Greensand Formation (UGS)
Previous Name(s): Glauconitic and micaceous sands of the zone of Mortoniceras inflatum [Obsolete Name and Code: Use CANS] (-2048)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Church Farm No.2 Borehole, Shaftesbury, (ST82SE/46) (1.96m - 5.21m). See Bristow et al. (1995, p.95, Figure 45). 
Type Area  The member is well developed around the hamlet of Cann, south-east of Shaftesbury. See Bristow et al. (1995, p.105). 
Reference(s):
White, H J O. 1923. The geology of the country south and west of Shaftesbury. Memoir of the Geological Survey of Great Britain, Sheet 313 (England and Wales). 
Bristow, C R, Barton, C M, Freshney, E C, Wood, C J, Evans, D J, Cox, B M, Ivimey-Cook, H C, and Taylor, R T. 1995. Geology of the country around Shaftesbury. Memoir of the British Geological Survey, Sheet 313 (England and Wales). 
Bristow, C R, 1989. Geology of the East Stour - Shaftesbury district (Dorset) British Geological Survey Technical Report WA/89/58. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E281 E282 E297 E298 E313 E314 E327 E328 E341 E342 E343