The BGS Lexicon of Named Rock Units — Result Details

Todber Freestone Member

Computer Code: TOF Preferred Map Code: TF
Status Code: Full
Age range: Oxfordian Age (JO) — Oxfordian Age (JO)
Lithological Description: Oolitic limestone, fine- to medium-grained, well sorted, commonly cross bedded, sparingly fossiliferous.
Definition of Lower Boundary: At the base of the lowest ooidal limestone.
Definition of Upper Boundary: At the top of the non-bioclastic, or evenly bedded, ooidal limestone.
Thickness: 0 - 5m
Geographical Limits: Across the northern half of the Shaftesbury Sheet (313).
Parent Unit: Stour Formation (STOU)
Previous Name(s): False Bedded Limestone (-575)
Marnhull And Todber Freestone (-3085)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Old quarries, 300m northeast of Gannetts, Todber. 
Reference(s):
Blake, J F and Huddleston, W H 1877. On the Corallian rocks of England. Quarterly Journal of the Geological Society of London, Vol.33, 260-405. 
Bristow, C R, 1989. Geology of Sheets 71NE and 71SE. (Marnhull-Sturminster Newton, Dorset) Part of 1:10,000 Sheet 313 (Shaftesbury). British Geological Survey Technical Report WA/89/59. 
Wright, J K, 1980. Oxfordian Correlation Chart. "In" Cope, C J W, (Editor). A correlation of Jurassic rocks in the British Isles, Part two: Middle and Upper Jurassic. Geological Society of London Special Report No.15. (p.61-76 in Correlation Chart). 
Arkell W J, 1933. The Jurassic System in Great Britain [Oxford: Clarendon Press.] 
Wright, J K, 1981. The Corallian rocks of north Dorset. Proceedings of the Geologists' Association, Vol.92, 17-32. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E313 E281