The BGS Lexicon of Named Rock Units — Result Details

Haughmond Conglomerate Member

Computer Code: YWCH Preferred Map Code: notEntered
Status Code: Pending Upgrade
Age range: Ediacaran Period (AD) — Ediacaran Period (AD)
Lithological Description: Purple and green micaceous pebbly sandstone and conglomerate containing abundant volcanic and metamorphic pebbles.
Definition of Lower Boundary: Taken at base of lowermost bed of conglomerate within the Bayston-Oakswood Formation, immediately overlying the purple and grey mudstones of the Portway Formation. Believed to be an unconformable contact by certain authors.
Definition of Upper Boundary: Taken at the transition into coarse feldspathic sandstones and interbedded thin mudstones of the Bayston-Oakswood Formation.
Thickness: 100 m thick.
Geographical Limits: Welsh Borderlands, specifically the Shrewsbury Sheet. Appears to pass laterally into the coarse sandstones of the Bayston-Oakswood Formation.
Parent Unit: Bayston-Oakswood Formation (BAGP)
Previous Name(s): Haughmond Conglomerate (-1293)
Alternative Name(s): none recorded or not applicable
Reference Section  South-east side of Sharpstone Hill. Pocock R W, et al., 1938. 
Greig D C, Wright, J E, Hains, B A and Mitchell, G H. 1968. Geology of the country around Church Stretton, Craven Arms, Wenlock Edge and Brown Clee. Memoir of the Geological Survey, Sheet 166 (England and Wales). (London: H.M.S.O.). 379pp. 
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.). 
Lapworth C and Watts W W. 1910. Shropshire. 739-769 in Geology in the field; the Jubilee Volume of the Geologists' Association (1858-1908). Monckton H W and Herries R S (editors). (London: Edward Stanford). 
1:50K maps on which the lithostratigraphical unit is found, and map code used: