The BGS Lexicon of Named Rock Units — Result Details

May Hill Sandstone Group

Computer Code: MHS Preferred Map Code: MHS
Status Code: Full
Age range: Telychian Age (ST) — Telychian Age (ST)
Lithological Description: Grey and brown sandstones and conglomerates with subordinate mudstone, as well as flaggy, fine-grained sandstone and siltstone with impersistent, grey limestone.
Definition of Lower Boundary: Drawn at base of sandstone and conglomerate of the Huntley Hill Formation, - base not seen in type area: drawn at base of Cowleigh Park Formation in the Malverns.
Definition of Upper Boundary: Drawn at conformable upward passage from calcareous siltstone and massive limestone of the Yartleton Formation (= Wyche Formation in the Malverns) to limestone and calcareous mudstone of Woolhope Limestone.
Thickness: c. 335m+
Geographical Limits: Gloucestershire and Herefordshire.
Parent Unit: Not Applicable (-)
Previous Name(s): May Hill Group (-4193)
May Hill Sandstone (-395)
May Hill Series (-1696)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  May Hill, near Ross on Wye, Gloucestershire and Herefordshire. 
Reference(s):
Salter, J W. 1867. May Hill Sandstone. Geological Magazine, Vol.4, p.204. 
Murchison, R I, 1859. Siluria, 2nd edition, p.94, London. 
Woodward, H B, 1876. The geology of England and Wales, p.49-52, London. 
Earp, J R and others, 1971. The Welsh Borderland. British Regional Geology. 
Sedgwick, A, 1853. On a proposed separation of the so-called Caradoc Sandstone into two district groups; viz. (1) May Hill Sandstone; (2) Caradoc Sandstone. Quarterly Journal of the Geological Society, Vol.9, p.218-227. 
Marr, J E, 1883. The classification of the Cambrian and Silurian rocks, p.40, Cambridge. 
Worssam, B C, Ellison, R A and Moorlock, B S P. 1989. Geology of the country around Tewkesbury. Memoir of the British Geological Survey, Sheet 216 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E216 E234 E199