The BGS Lexicon of Named Rock Units — Result Details

Abdon Group [Obsolete Name And Code]

Computer Code: ABD Preferred Map Code: notEntered
Status Code: Index Level
Age range: Pragian Age (DP) — Emsian Age (DE)
Lithological Description: Thick red fine-grained sandstones alternating with subordinate mudstones and rare intraformational conglomerates.
Definition of Lower Boundary: Drawn at the base of the Hillside-Dolomite Formation where dolomitised intraformational conglomerate with sandstone conformably rests upon coarse-sandstone with minor intraformational conglomerate of the Ditton Group.
Definition of Upper Boundary: Drawn at the conformable upward passage of the Abdon Limestone Formation where nodular to massive pedogenic limestone underlies coarser olive buff and green sandstone with minor intraformational conglomerate of the Clee Formation.
Thickness: 60-70m approx.
Geographical Limits: The Clee Hills area, Shropshire.
Parent Unit: Not Entered (?)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Cleobury Mortimer to Cockshutford. 
Type Section  Quarry: Brown Clee Hill, West Midlands. 
Reference(s):
Dineley, D L and Gossage, D W, 1959. The Old Red Sandstone of the Cleobury Mortimer area, Shropshire, Proceedings of the Geologists' Association, Vol. 70, 221-238. 
Allen, J R L. 1974. Sedimentology of the Old Red Sandstone (Siluro-Devonian) in the Clee Hills area, Shropshire, England. Sedimentary Geology, Vol. 12, 73-167. 
Robertson, T, 1927. The highest Silurian rocks of the Wenlock District. Memoir of the Geological Survey, Summary of Progress for 1926. p.80-97. 
Whitehead, T H, Robertson, T, Pocock, R W and Dixon, E E L. 1928. Geology of the country between Wolverhampton and Oakengates. Memoir of the Geological Survey of Great Britain, Sheet 153 (England and Wales). 
Allen, J R L. 1961. The highest Lower Old Red Sandstone of Brown Clee Hill, Shropshire. Proceedings of the Geologists' Association, Vol.72, 205-219. 
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.). 
Ball, H W, Dineley, D L, and White, E I. 1961. The Old Redstone Sandstone of Brown Clee Hill and the adjacent area. Bulletin of the British Museum (Natural History) Geological, Vol.5, p.175-310. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable