The BGS Lexicon of Named Rock Units — Result Details
Synalds Formation
| Computer Code: | SYGP | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| 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 670 m. | ||
| 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 [Obsolete Name and Code: Use SYGP] (-2469) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Long Synalds, 1.5 miles west of Church Stretton, Shropshire. | ||
| Type Section | The Pike, north of Cardingmill Brook, Church Stretton. | ||
| Reference(s): | |||
| Wright, J E, 1968. The geology of the Church Stretton area (Explanation of 1:25 000 Geological Sheet SO49). Institute of Geological Sciences. | |||
| 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). | |||
| 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. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| none recorded or not applicable | |||