The BGS Lexicon of Named Rock Units — Result Details

Tickwood Member

Computer Code: TKB Preferred Map Code: TB
Status Code: Full
Age range: Homerian Age (SH) — Homerian Age (SH)
Lithological Description: Greenish-grey siltstones with bands of prominent limestone nodules.
Definition of Lower Boundary: Transitional on mudstones of the underlying Coalbrookdale Formation. Base taken beneath first bed of coalesced limestone nodules.
Definition of Upper Boundary: Base of reef facies limestones within the Much Wenlock Limestone Formation.
Thickness: 24m
Geographical Limits: North Shropshire.
Parent Unit: Much Wenlock Limestone Formation (WEL)
Previous Name(s): Farley Member (-3082)
Tickwood Beds (-3726)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Below the bend of the road over Harley Hill. 
Reference(s):
Pocock R W, Whitehead T H, Wedd C B and Robertson T. 1938. Shrewsbury District including the Hanwood Coalfield. Memoir of the Geological Survey of Great Britain, England and Wales. (London: H.M.S.O.). 
Bassett, M G, Cocks, L R M, Holland, C H, Rickards, R B and Warren, P T, 1975. The type Wenlock Series. Report of the Institute of Geological Sciences, No.75/13. 
Hamblin, R J O and Coppack, B C, 1995. Geology of Telford and the Coalbrookdale Coalfield. Memoir of the British Geological Survey, parts of Sheets 152 and 153 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E152