The BGS Lexicon of Named Rock Units — Result Details

Lytchett Matravers Sand Member

Computer Code: LYMS Preferred Map Code: notEntered
Status Code: Pending Upgrade
Age range: Ypresian Age (GY) — Ypresian Age (GY)
Lithological Description: Fine-grained, commonly ferruginous cemented sand. Flint pebble beds are present locally and glauconite may occur in the basal beds.
Definition of Lower Boundary: Sharp contact (and sharp feature break, locally associated with springs) on the clay above the Warmwell Farm Sand.
Definition of Upper Boundary: Sharp contact with the clay above the Lytchett Matravers Sand. Underlies the unconformable base of the Poole Formation on the north side of Wimborne.
Thickness: 8m.
Geographical Limits: The area around Bournemouth, Dorchester and Swanage.
Parent Unit: London Clay Formation (LC)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  The area of Lytchett Matravers, Dorset. Temporary exposures only. Bristow et al. (1991). 
Reference(s):
Bristow, C R. 1999. The geology of the Wareham, Arne, Creech and Corfe Castle area, Dorset. British Geological Survey Technical Report, WA/99/43 (Keyworth, Nottingham). 
King, C. In press. A correlation of Tertiary rocks in the British Isle and adjacent areas. Special Report of the Geological Society of London, No.12. 
British Geological Survey. 2004. Ringwood. Sheet 314 (England and Wales). Solid and Drift Geology. (Keyworth, Nottingham: British Geological Survey) 
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:
E314 E328 E329 E341 E342 E343