302 8. S. Warren — Rubble Drift, Porfslade, Sussex. 



natural forces moulds and shapes hill and vale to make the soft 

 scenery of the Midlands. 



Micaceous marls. 



Compact dark clay. 

 I Zone A.marr/aritatus. 



Hill Section to show the Formation op the Terkaced Slopes. 



Faults. — Where there are terraced banks I have been able to 

 trace in nearly every instance also the presence of a contiguous fault. 

 At Gredenton Hall, near Fenny Compton, Warwickshire, a small 

 exposure shows the fault at the south-west end where the marlstone 

 rock has slipped down to the level of the marls, and, as it were, 

 squeezed the banks out of the flanks of the hill. The faults are 

 probably part of the step-faulting common to every hillside. Here 

 and there the slope of the line of terrace is in the opposite direction 

 to the dip of the vale. 



The cols and coombs of our minor vales are full of varying 

 examples. The main vale (the Cherwell) is of low grade and is 

 void of examples. The banks of the minor vales (where there 

 is uniformity of stratigraphical conditions, as over the area covered 

 bv the banks) have a grade varying in steepness in proportion to 

 approach to the source. It is to the region bounded by the Edge Hill 

 escarpment and the Burton Dassett Hills that these notes more 

 particularly apply. 



The steps of the meadow bank, the steps of the mountain from 

 summit to plain, parallel roads, cirques, corries, and the like, have 

 a common origin downslide, the movement of rock along lines of 

 drainage towards the lines of slower disintegration. Whether we 

 study meadow banks or mountains, uniformity of plan shows through 

 the whole. 



Note. — See article in the G-eologioal Magazine, 1869, Vol. VI, 

 pp. 537-42, by Q. Poulett Scrope, F.K.S. 



IV. — Note on a Section oe the Pleistocene Eubble Deipt neae 



POETSLADB, SuSSEX. 

 By S. Hazzledine "Wakren. 



THE interest of this section lies in its bearing on the theoretical 

 considerations relative to the causes that produced the extensive 

 deposits of Eubble Drift in the South of England. 



The old sea cliff, which is now protected from the sea by a shingle- 

 bank some little distance away, was, at the tinae of my visit, in 

 November, 1896, being cut back for the extraction of flints and 

 sand. The following section was noted, the thicknesses given 

 being only approximate : — 



