The BGS Lexicon of Named Rock Units — Result Details
Elsworth Rock Formation
| Computer Code: | ELR | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Oxfordian Age (JO) — Oxfordian Age (JO) | ||
| Lithological Description: | Highly variable, marly limestone bands and nodules and ferruginous, oolitic clays. | ||
| Definition of Lower Boundary: | Drawn at base of limestone and ironshot clay of the Elsworth Rock Formation where it rests conformably on the Upper Oxford Clay. | ||
| Definition of Upper Boundary: | Drawn at conformable upward passage from limestone of the Elsworth Rock Formation to the Ampthill Clay. | ||
| Thickness: | 2.5 - 10.5 m. | ||
| Geographical Limits: | Cambridge district. | ||
| Parent Unit: | Corallian Group (CR) | ||
| Previous Name(s): | Elsworth Rock [Obsolete Name and Code: Use ELR]
(-4023)
Elsworth Rock Group [Obsolete Name and Code: Use ELR, WWB] (-4635) West Walton Beds [Obsolete Name and Code: Use ELR, WWB] (-2170) Elsworth Series [Obsolete Name and Code: Use ELR] (-2782) Oakley Beds [Obsolete Name and Code: Use OKLY, ELR] (-1526) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Elsworth, Cambridgeshire, England. | ||
| Reference(s): | |||
| Wedd, C B, 1901. On the Corallian rocks of St Ives and Elsworth. Quarterly Journal of the Geological Society, Vol.57, p.73. | |||
| Worssam, B C and Taylor, J H. 1969. The geology of the country around Cambridge. Memoir of the Geological Survey of Great Britain, Sheet 188 (England and Wales). | |||
| Page, K N, 1986. A new section in the Elsworth Rock (Jurassic, Oxfordian) at Papworth Everard, near Cambridge, England. Proceedings of the Geologists' Associatiion, Vol.97, p. 229-235. | |||
| Roberts, T, 1892. The Jurassic rocks of the neighbourhood of Cambridge. Sedgwick Prize Essay for 1886, p.7. | |||
| Wedd, C B, 1898. On the Corallian rocks of Upware, Camnridgeshire. Quarterly Journal of the Geological Society, Vol.54, p.609. | |||
| Arkell, W J. 1937. The zonal position of the Elsworth Rock and its alleged equivalent at Upware. Geological Magazine, Vol. 74, p. 445. | |||
| Edmonds, E A and Dineham, C H. 1965. Geology of the country around Huntingdon and Biggleswade. Memoir of the British Geological Survey. Sheets 187 and 204 (England and Wales). | |||
| Seeley, H G. 1861a. Notice of the Elsworth and other new rocks in the Oxford Clay, and of the Bluntisham Clay above them. Geologist, Vol.4, 460-461. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E187 E188 E204 | |||