tntra-Jurassic Movements. 205 



Similarly at Wallingford on the southward prolongation of the 

 Banbury axis, the course of the Upper Greensand outcro]i clearly 

 indicates the existence of gentle anticlinal folding. 



In the region further east, Mr. R. H. Rastall has called attention 

 to the anticlinal disposition of the Upper Jurassic with regard to 

 an axis of maximum erosion which passes north-westwards througli 

 Sandy (10 miles east of Bedford), and he has explained the structures 

 as due to a pre-Cretaceous posthumous uplift of the Charnian axis.^ 



IV. Relation of the Folds to Palaeozoic Outcrops. 



It is only to be expected that several of these axes of Mesozoic 

 uplift should be aligned with uplifts that have resulted in exposing 

 the nearest outcrops of Palaeozoic rocks. Thus the Moreton and 

 Winchcombe anticlines are aligned respectively with the Warwick- 

 shire and South Staffordshire Coalfields, and the Chipping Campden 

 and Bredon synclines with the troughs between the Warwickshire 

 and South Staffordshire and South Staffordshire and Forest of Wyre 

 Coalfields, while the connexion between the Melton Mowbray 

 anticline and the upHft of pre-Cambrian rocks in Charnwood Forest 

 has been discussed elsewhere.^ The connexions between the 

 remaining anticlines, the Banbury, Weedon, and Market Harborough 

 folds and the nearest Palaeozoic rocks are not so clear, but it will 

 be shown that there are reasons for connecting both the Banbury 

 and the Weedon folds with the Warwickshire Coalfield, and the 

 Market Harborough fold with the Charnwood Forest area. 



Several of these areas of Jurassic folding have already been 

 explained as due to posthumous movements along axes of Palaeozoic 

 uplift. This was suggested as early as 1901 by Mr. Buckman, in 

 discussing the Bajocian rocks of the North Cotteswolds ; ■ 

 Mr. Buckman showed that penecontemporaneous " erosion is likely 

 to have taken place along similar lines at different times, and there- 

 fore may be connected with the folds in the Palaeozoic rocks, and 

 may have a bearing on the thickness of the rocks overlying the 

 coal measures ".'' Professor W. S. Boulton has more recently 

 suggested that minute Jurassic zonal studies Avill all have their 

 value when estimating the nature and thickness of cover over the 

 buried coal measures.^' A similar suggestion was made by Professor, 

 P. F. Kendall regarding anticlinal axes in East Angha,® by 

 Mr. Rastall '' for the pre-Cretaceous uplift which caused excessive 

 denudation of Upper Jurassic rocks along a continuation of the 



^ Rastall, Cambridgeshire : Geology in the Field, pt. i, 1910, ]-). 143. 



2 Cox, Phil. Trans., ser. A, vol. 219, Appendix, 1919. 



' Buckman, " The Bajocian of the North Cotteswolds " : Quart. Journ. 

 Geol. Soc, vol. Ivii, 1901, pp. 147-9. 



* Op. cit., p. 154. 



^ Presidential Address to Section C (Geolocy), Report Brit. Assoc, New- 

 castle-on-Tyne, 1916, p. 383. 



^ Report of the Royal Commission on Coal Supplies, pt. ix. Appendix iii. 



"' Cambridgeshire: Geology in the Field, ])t. i, 1910, p. 143. 



