118 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 4, 



ft. in. 

 Pale clays, and interrupted thin laminae of shelly 



Forest-marble 12 



Solid shelly bed ; top oolitic, middle close-grained, 



base more sandy 3 9 



Sandy and marly bed 6 



Dark laminated clay, with jet (Cyrena) 10 



Pale blue clay with calcareous nodules 8 



Dark clay, with jet 8 



Pale blue clay 8 



Brown clay 9 



Sandy layer 6 



g. Oolite; the upper bed waterworn on the surface, co- 

 vered by drifted Ostrece and Terebratula maxillata 



Top bed ; pale, unequal-grained 2 4 



Parting. 



Bed variable in texture, usually very compact 2 6 



Parting. 



Bed full of Terebratula maxillata, the valves cohering 3 



In a quarry half a mile further west, about 40 feet more of the 

 Oolite appears, without actually disclosing the bottom, which, how- 

 ever, is traceable in the vicinity, and shows sandy layers, equivalent 

 to the Stonesfield beds. 



According to the settled opinion of the Ordnance Geological Sur- 

 vey, the oolite of the valley of the Cherwell, with the sandy layers 

 between it and the Lias, is entirely to be referred to the Great 

 Oolite*. This conclusion rests on the actual tracing out of the 

 Inferior Oolite to its extinction eastward, and to the determination 

 of the true place of the Stonesfield beds above the Fuller's earth, in 

 the district towards Cheltenham. This oolite, with sandy layers be- 

 low, and a variable argillaceous series above (capped by Cornbrash), 

 has been traced, by Northampton, to the cuttings in the Great 

 Northern Railway near Stamford and Grantham f. It cannot be 

 doubted that the series here examined continues, with no important 

 change, through Lincolnshire to the Humber ; on the north of that 

 river the range is continued by the oolite of Brough and Cave ; it is 

 resumed, after interruption by over-extended chalk, in the oolite of 

 Whitwell and Crambe, and recognized again in the Millepore-rock 

 at the base of the Gristhorpe Cliffs, where it is surmounted by a 

 variable series of shales, sands, ironstones, and several shelly bands, 

 one specially calcareous, which are finally covered by Cornbrash. 



Mr. Morris has compared these Gristhorpe beds above the Mille- 

 pore-rock with the Forest-marble series of Lincolnshire ; and thus 

 it appears to be admitted that the series of Yorkshire oolites above 

 the Lias and below the Kelloway Bock is connected with that of 

 the Midland tracts of England by real continuity of the Great Oolite, 



* See Map of the country north of Oxford. Hull in Mem. of Geol. Survey, 

 1857, and communication to Geol. Soc. 1859. 



f Morris in Quart. Journ. Geol. Soc. 1855 ; see also Ibbetson and Morris, Brit. 

 Assoc. Reports, 1847, and Brodie, Brit. Assoc. Reports, 1850. 



