Computer Code: |
AGP |
Preferred Map Code: |
notEntered |
Status Code: |
Full, pending ratification |
Age range: |
Ludlow Epoch (SU)
— Ludlow Epoch (SU) |
Lithological Description: |
Grey nodular limestones with siltstone bands in the lower part passing upwards into massive blue hearted crystalline limestones passing into grey nodular limestones. The middle is very fossiliferous. |
Definition of Lower Boundary: |
Drawn at the base of the Aymestry Group where nodular limestone conformably rests upon flaggy calcareous siltstones with fine-grained limestone nodules of the Lower Ludlow Shales. |
Definition of Upper Boundary: |
Drawn at the conformable upward passage of the Aymestry Group where nodular limestones pass into olive green and buff flaggy siltstones of the Upper Ludlow Shales. |
Thickness: |
Max thickness 70 metres approx. |
Geographical Limits: |
The south Shropshire area including Aymestry, Herefordshire. |
Parent Unit: |
Not Entered (?)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
From the southern edge of the Church Stretton district at Saddle Hill about 1.5kms east of Clungunford, to the Northern limit near Henmoor Hill. |
Reference(s): |
Watts, W W, 1925. The Geology of south Shropshire. Proceedings of the Geologists' Association, Vol.36, 321-363. |
Cocks, L R M, 1989. The geology of South Shropshire. Proceedings of the Geologists' Association, Vol.100 (4) p.505-519. |
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. |
Elles, G L and Slater, I L, 1906. The highest Silurian rocks of the Ludlow district. Quarterly Journal of the Geological Society of London, 61, 195-221. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
none recorded or not applicable |