VOL. XVII. (i) INFERIOR OOLITE— SOUTH COTTESWOLDS 131 



In the disused quarry on Scar Hill the Freestone has been 

 mined, and, as usual, its top-bed is bored. Above it, is the 

 Upper Trigonia-Grit, and then comes the Clypeus-Grit. 



A number of geologists have investigated the Scar-Hill 

 sections, and first amongst them was Lycett. He remarked 

 that we find here " the entire marl group reduced to a thick- 

 ness of four feet, destitute both of corals and Brachiopoda, but 

 containing Gasteropoda and Conchifera, generally of same 

 size.'" He also noticed the sequence of Top-Beds, and appar- 

 ently thought that the lower part of the Upper Trigonia-Gvit 

 was Gryphite-Grit, "but without the characteristic gryphite."^ 

 It must be borne in mind, however, that there is no Gryphite-, 

 Buckmani-, or Lower Tngoma-Grit (nor any " Intervening 

 Bed") at Scar Hill, and that fossils from the Inferior Oolite of 

 Nailsworth must have come from the Upper Trigonia- or 

 Clypeus-Grits, or from the Aalenian.^ 



Wright also identified the representative of the Oolite Marl 

 at Scar-Hill, and repeated Lycett's observations concerning it, 

 namely, that it " contains neither corals nor Brachiopods," and 

 continues : " but is charged with long spiral univalves belonging 

 to the genera Chemnitzia and NerincBa, with a few conchifera 

 and small Gasteropoda. The Nerinaea limestone is a fine 

 argillaceous rock, close in texture, and feebly oolitic "* 



The late W. H. Hudleston gives a general section of 

 "Nailsworth Hill and District " in his Monograph, "partly 

 derived from observations, partly from other sources," and 

 follows Lycett in his recognition of " Grit without Gryphites."* 



The chief feature of the Scar-Hill section is undoubtedly 

 the fossiliferous Nerinaa-Bed. Lycett obtained a large number 

 of lamellibranchs from this bed and the underlying Freestones. 

 They are now housed at Jermyn-Street Museum. 



It will be unnecessary to detail the sequence observable at 

 Scar Hill, because it can be much more satisfactorily made out 

 in a large quarry in work on Culver Hill, Amberley. 



I " Cotteswold Hills" (1857), p. 49. 2 Ibid., pp. 69-70. 3 Fossils are often found in old col- 

 lections labelled " Inferior Oolite, Minchinhampton." As their matrix is usually a shelly white 

 oolite, very similar to the shelly Great Oolite, and the locality given is " Minchinhampton," one is 

 at first sight disposed to think that the Great Oolite is meant instead. 4 Quart. Joum. Geol. Soc, 

 vol. xvi. (i859)pp. 12-13. 5 Monogr. Brit. Jurassic Gasteropoda — Gasteropodaof the Inferior Oolite, 

 pp. 59-61. 



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