The BGS Lexicon of Named Rock Units — Result Details

Synalds Formation

Computer Code: SYGP Preferred Map Code: notEntered
Status Code: Pending Upgrade
Age range: Ediacaran Period (AD) — Ediacaran Period (AD)
Lithological Description: Mainly purple shaly mudstones and siltstones with subordinate sandstone bands; locally some greenish grey mudstones and sandstones with volcanic tuff.
Definition of Lower Boundary: Drawn at the base of the Synalds Formation where purple shaly mudstones and siltstones rest conformably upon the Carding Mill Grit of the Burway Formation.
Definition of Upper Boundary: Drawn at the conformable upward passage of the Synalds Formation where dominantly purple shales and sandstones pass into greenish grey flaggy siltstones and sandstones of the Lightspout Formation.
Thickness: About 670m
Geographical Limits: Within the Church Stretton district. Longmyndian rocks of the Long Mynd Massif, Shropshire.
Parent Unit: Stretton Group (YST)
Previous Name(s): Synalds Formation [Obsolete Code: Use SYGP] (YSS)
Synalds Group (-2469)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  The Pike, north of Cardingmill Brook, Church Stretton. 
Type Area  Long Synalds, 1.5 miles west of Church Stretton, Shropshire. 
Reference(s):
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. 
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). 
Wright, J E, 1968. The geology of the Church Stretton area (Explanation of 1:25 000 Geological Sheet SO49). Institute of Geological Sciences. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable