The BGS Lexicon of Named Rock Units — Result Details
Lenthay Limestone Bed
| Computer Code: | LEN | Preferred Map Code: | Len |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Bathonian Age (JN) — Bathonian Age (JN) | ||
| Lithological Description: | Micritic limestone with a shelly and argillaceous base and an extensively bioturbated and argillaceous top. Contains abundant Sphaeroidothyris lenthayensis. | ||
| Definition of Lower Boundary: | Transition from shell-detrital mudstone to shelly argillaceous limestone. | ||
| Definition of Upper Boundary: | Transition to calcareous mudstone from argillaceous limestone. | ||
| Thickness: | 0 - c.1 m; 0.32 m in Purse Caundle Borehole. | ||
| Geographical Limits: | Lenthay Common, west of Sherborne, to c.1 km northwest of Milborne Port. | ||
| Parent Unit: | Lower Fuller's Earth Member (LFE) | ||
| Previous Name(s): | Lenthay Bed [Obsolete Name and Code: Use LEN]
(-2288)
Sphaeroidothyris Bed [Obsolete Name and Code: Use LEN] (-2897) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Lenthay Common. Bomb crater (1940) on the west side of Lenthay Copse, Lenthay Common (Fowler, 1957). | ||
| Reference Section | BGS Purse Caundle Borehole (ST71NW/7) (Barton and others, 1993) (89.13 to 89.45 m depth). | ||
| Reference Section | Housing Estate, Lenthay Common. Foundation and drainage trenches on Lenthay Common, exposed 1967 (Torrens, 1968) | ||
| Reference(s): | |||
| Barton, C M, Ivimey-Cook, H C, Lott, G K, and Taylor, R T. 1993. The Purse Caundle Borehole, Dorset: stratigraphy and sedimentology of the Inferior Oolite and Fuller's Earth in the Sherborne area of the Wessex Basin. British Geological Survey Research Report SA/92/01. | |||
| Fowler, J, 1957. The geology of the Thornford pipe-trench. Proceedings of the Dorset Natural History and Archaeological Society, Vol.78, p.51-57. | |||
| Cope, J C W (Editor) 1980b. A correlation of Jurassic rocks in the British Isles. Part Two: Middle and Upper Jurassic. Geological Society of London Special Report, No.15 | |||
| Bristow, C R, Barton, C M, Freshney, E C, Wood, C J, Evans, D J, Cox, B M, Ivimey-Cook, H C, and Taylor, R T. 1995. Geology of the country around Shaftesbury. Memoir of the British Geological Survey, Sheet 313 (England and Wales). | |||
| Barton, C M. 1989. Geology of the Milborne Port district (Somerset and Dorset) 1:10 000 Sheet ST61NE. Technical Report of the British Geological Survey, Onshore Geology Series, WA/89/60 | |||
| Torrens, H S, 1968. 'Geology'. "In" Dorset Natural History Reports 1967. Proceedings of the Dorset Natural History and Archaeological Society, Vol.89, p.42. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E313 | |||