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 [Obsolete Name and Code: Use MHS]
(-4193)
May Hill Sandstone [Obsolete Name and Code: Use MHS] (-395) May Hill Series [Obsolete Name and Code: Use MHS] (-1696) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | May Hill, near Ross on Wye, Gloucestershire and Herefordshire. | ||
| Reference(s): | |||
| 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). | |||
| 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. | |||
| 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. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E216 E234 E199 | |||