Vol. 57.] 



OP THE NOKTH COTTES WOLDS. 



127 



Birdlip. 



Upper 



Triffonia-grit. 



Upper \ V 

 Freestone. 



Table I.-"— Sequence of Strata. 

 Leckhampton Hill. 



Upper Trigonia-grit 



Notgrove Freestone- 

 (a remnant). 



Gryphite-grit.- 



T. Stickmani-grit. — 

 Lower Trigonia-grit. 



Snowshill Clay^ 

 (a trace). 



Oleeve Hill. 

 Upper Trigonia-grit. 

 T. Phillipsiana-hedB. 

 Bourguetia-he(i s . 

 Witchellia-bedB . 

 Notgrove Freestone. 



Upper Freestone. 



-Gryphite-grit. 



T. BucJcraaoii-grit. 

 -Lower Trigonia-grit. 



Snowshill Clay. 



Harford Sands. 

 "Upper Freestone. 



The interest which attaches to the exploration of the Xorth 

 Cotteswolds is to ascertain how and in what manner this inter- 

 vention of strata continues in a farther north-easterly traverse. 

 The results are these : — That the three upper intervening beds at 

 Cleeve Hill — the PhilUjpsiana-Witchellia-hedis — have been planed 

 away, so that Upper Trigonia-gnt rests upon Notgrove Freestone ; 

 but in the lower part of the intervening series there has been a 

 considerable development of strata, so that an important series of 

 deposits separates the Lower Trigonia-grit from the Upper Freestone. 

 Other results are that the Lower Trigonia-grit is very considerably 

 altered in lithic character, and that in the south-eastern part of the 

 district there has been removal of beds below the Witchellia-grit, 

 with the consequence that the Upper Trigonia-grit rests upon 

 Snowshill Clay. 



What these results indicate are as follows: — After the deposition 

 of the Upper Freestone there was denudation of the deposited strata, 

 with greater erosion south-westward. Then there was gradual 

 depression producing overlap of deposits, — the Harford Sands being 

 deposited over the North Cotteswolds as far as Cleeve Hill, but 

 not beyond ; the Snowshill Clay being deposited over a wider area, 



^ Entered in the paper on ' The Mid-Cotteswolds ' as Harford Sands 

 equivalent ; afterwards distinguished and corrected, see paper on ' The Cleeve 

 Hill Plateau ' Quart. Journ. Geol. Soc. vol. liii (1897) p. 611. 



