126 



ME. S. S. BIJCKMAN OS THE BAJOCIAN [Feb. TpOI, 



:9. Bajocian and Contiguous Deposits in the North Cotteswolds : 

 The Main Hill-Mass. By S. S. Buckman, Esq., F.G.S. (Eead 

 December 5th, 1900.) 



[Plate VI— Map.] 



Contents. 



Page 



I. Introduction > 126 



II. Cause of the Bajocian Denudation 128 



III. Generalized Section of the North Cotteswolds 129 



IV. Detailed Sections in the North Cotteswolds 130 



V. Supplementary Notes 138 



(a) The Snowshill Clay. 



(b) The Harford Sands. 



(c) A Eeview of Work accomplished. 



(d) Section through the North Cotteswolds, from west 



to east. 



(e) Comparison with Prof. Hull's Section. 



(/) Bajocian Denudation and the Vale of Moreton. 

 (ff) Bajocian Denudation and the Vale of Bourton. 

 (k) Penecontemporaneous Erosions and the Position 

 of Coal. 

 VI. Appendix I 149 



(a) The Position of the Upper Trigonia-grit. 



(b) Note on the Upper Freestone Series. 



(c) Note on the Sandy Ferruginous Beds. 



(d) The Various ' Sands.' 



VII. AppendixII (Dates of some Erosions in' Jurassic'Time)... 152 

 VIII. Summary 154 



I. Introduction. 



This paper is a continuation of two former communications 

 published by the Society, namely, ' The Bajocian of the Mid- 

 •Cotteswolds,' Quart. Journ. Geol. Soc. vol. li (1895) p. 388, and 

 'Deposits of the Bajocian Age in the Northern Cotteswolds: The 

 Cleeve Hill Plateau,' vol. liii (1897) p. 607. So far as the sequence 

 of the strata themselves was concerned, the results arrived at in these 

 two papers may be best expressed in Table I (p. 127^. 



What the Table indicates is this : — In a north-easterly traverse 

 from Birdlip to Cleeve there are found, at Leckhampton Hill 

 five distinct beds separating two strata which at Birdlip were 

 in juxtaposition ; and at Cleeve Hill, three more distinct beds 

 separating two beds which at Leckhampton Hill were in juxta- 

 position, namely, the Dpper Trigonia-grit and the IS'otgrove 

 Freestone, and another distinct bed separating two other beds 

 similarly placed at Leckhampton — the Snowshill Clay and the Upper 

 Freestone. Consequently where nothing is intervening at Birdlip 

 there are five beds inserted at Leckhampton Hill, and nine beds 

 inserted at Cleeve Hill : that is, with regard to the five at Leck- 

 liampton, three additional at the top, and one more at the bottom. 



