The BGS Lexicon of Named Rock Units — Result Details

Parkstone Clay Member

Computer Code: PKC Preferred Map Code: notEntered
Status Code: Full
Age range: Paleocene Epoch (GP) — Lutetian Age (GL)
Lithological Description: Medium grey to greyish brown and brown, unbedded, plastic 'ball clay' overlain by lignitic, commonly laminated, clay.
Definition of Lower Boundary: Sharp channelled contact with underlying Parkstone Sand.
Definition of Upper Boundary: Erosional channelled contact with overlying Branksome Sand Formation that may in places cut out the Parkstone Clay Member.
Thickness: 0-22m.
Geographical Limits: East Dorset and West Hampshire.
Parent Unit: Poole Formation (POOL)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Christchurch Borehole SZ29SW12 between depths of 95.49 and 110.60m. 
Type Area  Former clay pits at Parkstone, Poole. Most of the pits have now been filled, but poor exposures still remain e.g. SZ 0365 9097; SZ 0369 9133. Bristow et al. (1991). 
Reference(s):
Curry, D, Adams, C G Boulter, M C, Dilley, F C, Eames, F E, Funnell, B M and Wells, M K. 1978. A Correlation of Tertiary rocks in the British Isles. Geological Society of London Special Publication , Vol.12, 1-72. 
Edwards, R A and Freshney, E C. 1987. Lithostratigraphical classification of the Hampshire Basin Palaeogene Deposits (Reading Formation to Headon Formation) Tertiary Research, Vol.8, 43-73. 
Bristow, C R, Freshney, E C and Penn, I E. 1991. Geology of the country around Bournemouth. Memoir for 1:50 000 geological sheet 329 (England and Wales). HMSO, London. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E329 E343