200 PROCEEDINGS COTTESWOLD CLUB 191 1 



but it may be as well to redirect attention to Prof. Hull's 

 interesting discovery of conglomerate Marlstone " in a quarry 

 south of Daylesford House," where the pebbles " consist of 

 pieces of slate and sandstone, often of the character of trappean 

 ash, while all the fragments have a Silurian aspect.'" The 

 quarry is now overgrown. 



The Upper Lias in this district is clay from top to bottom. 

 It is thickest in the railway-cutting at Hook Norton (30 to 40 

 feet), and thinnest in the south-eastern portion of the district, 

 being at Fawler (just outside the area under consideration) 

 only 12 feet thick. The clay in the Hook-Norton Cutting is 

 mainly of subcarinati, fibulati and brauniani hemera; ; that at 

 Fawler, Mr S. S. Buckman informs me "speaking from memory, 

 of fibulati and perhaps subcarinati hemerae : there are signs of 

 falciferi, but they look like remanie." {in litt., April nth, 1911.) 



Speaking approximately, the 5cissM wi-Beds {vide Table I.) 

 rest directly upon the Upper-Lias clay in the north-western 

 half of the district, and the Clypeus-Grit — with or without the 

 intervention of a thin layer of conglomerate — immediately 

 thereon in the south-eastern portion. 



There is therefore a great non-sequence in the Chipping- 

 Norton district between the Upper Lias and the immediately 

 superincumbent Inferior-Oolite beds, and it is greatest where 

 the Clypeus-Gni rests directly upon the Upper Lias. The 

 lower limit of the Inferior Oolite is thus sharply-defined. Such, 

 however, is not the case with regard to the upper limit, for the 

 component layers of the Neseran Beds, which have been 

 already referred to, have an irregular geographical extent and 

 are overlaid by various members of the succeeding, unquestion- 

 able Great-Oolite beds. The line of demarcation between the 

 Great Oolite proper and the Neaeran Beds is therefore often 

 none too definite, and the reason, doubtless, is — as Mr Wood- 

 ward has remarked — mainly because the Chipping-Norton 

 Limestone, Neseran Beds, etc., were flexured previous to the 

 deposition of the higher beds. 



I " The Geology of the Country around Cheltenham " (1857), p. 20. Mora. Geol. Surv. 



