| Lithological Description: |
| Predominantly pale coloured ooidal limestones of varying types; ferruginous and sandy (Leckhampton Member), pisoidal and shelly (Crickley Member) at the base, unfossiliferous and cross bedded in the middle (Cleeve Cloud Member), shelly and marly in the upper part (Scottsquar Member), uppermost beds include sand and clay (Harford Member). |
| Definition of Lower Boundary: |
| Disconformity: change upward from mudstone, sandstone or ironshot limestone of Lias Group into predominantly ooidal limestone sequence as in lithological description. |
| Definition of Upper Boundary: |
| Disconformity, generally a hardground: overlain by Aston Limestone Formation where present, or Salperton Limestone Formation. |
| Thickness: |
| Typically 40 to 46m; type section c.45m, maximum c.74m (Cleeve Hill area). |
| Geographical Limits: |
| Cotswolds Hills from north Oxfordshire (near Chipping Norton) to northeast South Gloucestershire District. Absent due to overstep by Salperton Limestone Formation in south Cotswolds and in Vale of Moreton area. (See Barron, A J M, et al, 1997, fig.4). |
| Reference(s): |
| Richardson, L, 1904. Handbook to the geology of Cheltenham and neighbourhood (Cheltenham: Norman, Sawyer and Co). |
| Sumbler, M G and Barron, A J M, 1996. Day Excursion to the Cotswolds. Mercian Geologist, Vol.14, 34-37. |
| Gray, J W, 1924. Leckhampton Hill, Gloucestershire: the Wellington Quarry and other sections. Proceedings of the Cotswold Naturalists' Field Club, Vol.22, 33-42. |
| Brodie, P B, 1850. On certain beds in the Inferior Oolite, near Cheltenham. Quarterly Journal of the Geological Society of London, Vol.6, 239-249. |
| Buckman, S S, 1901. Bajocian and contiguous deposits in the north Cotswolds: the main hill-mass. Quarterly Journal of the Geological Society of London, Vol.57, 126-155. |
| Barron, A J M, 1999. Geology of the Bishop's Cleeve area (1:10 000 Sheet SO92NE). British Geological Survey Technical Report WA/99/01. |
| Woodward, H B, 1894. The Jurassic Rocks of Britain, Vol.4. The Lower Oolitic Rocks of England (Yorkshire excepted). Memoir of the Geological Survey of the United Kingdom. |
| Murray, J W, 1968. The Inferior Oolite of the Cotswold scarp, Wotton-under-Edge to Leckhampton. Proceedings of the Bristol Naturalists' Society, Vol.31, 535-549. |
| Brodie, P B, 1851, On the basement beds of the Inferior Oolite in Gloucestershire. Quarterly Journal of the Geological Society of London, Vol.7, 208-212. |
| Mudge, D C, 1978. Stratigraphy and sedimentation of the Lower Inferior Oolite of the Cotswolds. Journal of the Geological Society of London, Vol.135, 611-627. |
| Wright, T, 1860. On the subdivisions of the Inferior Oolite of the south of England, compared with the equivalent beds of that formation on the Yorkshire coast. Quarterly Journal of the Geological Society of London, 16, 1-48. |
| Barron, A J M, Sumbler, M G and Morigi, A N, 1997. A revised lithostratigraphy for the Inferior Oolite Group (Middle Jurassic) of the Cotswolds, England. Proceedings of the Geologists' Association, Vol.108, 269-285. |
| Parsons, C F, 1980. Aspects of the statigraphy and ammonite faunas of the Aaenian-Bajocian stages in Great Britain. Unpublished PhD thesis, University of Keele. |
| Cox, B M, and Sumbler, M G. 2002. British Middle Jurassic stratigraphy. Geological Conservation Review Series, Vol.26. (Peterborough: Joint Nature Conservation Committee.) |
| Richardson, L, 1906. Half-day excursion to Leckhampton Hill, Cheltenham. Proceedings of the Cotswold Naturalists' Field Club, Vol.15, 182-189. |
| Mudge, D C, 1995. The Middle Jurassic of the Cotswolds. In (Taylor, P D; ed). Field Geology of the British Jurassic. Geological Society, London, 31-50. |
| Ager, D V, 1969. The Lower and Middle Jurassic rocks of the Cotswold Escarpment and the Vale of Worcester. In (Torrens, H S, ed). Guide for north Somerset and Gloucestershire. International field symposium on the British Jurassic, Excursion No.2, B27-B43. |
| Buckman, S S, 1905. A monograph of the ammonites of the Inferior Oolite Series, Pt.13, Supplement pp.clxix-ccix. |
