Vol.51.] GPvEESTSAjST) OF EAST STTEItET. 107 



up in the Folkestone Beds at the 'Bookery ' section, but the matrix 

 there is the usual Folkestone Sand, and the exact horizon of this 

 bed, beyond that it is close to the base of the series, cannot be 

 ascertained. 



Bassing to the east from the Horsham Boad, sections through the 

 sandy area are to be seen in Chart Lane and in Bunchbowl Lane. 

 In the former lane the section corresponds almost exactly with 

 that on the Horsham Boad and is capped -with drift, of which I 

 shall speak presently. I have been much struck by the changes 

 which the sections in these hollow lanes undergo within a short 

 period. Slips occur in the winter, and sections are open during one 

 summer which are spoilt and overgrown by the next. During the 

 last three years, however, I have at various times noted the clayey 

 sands with the layer of phosphatic nodules (Local Group 3) above the 

 junction of Chart Lane with New Boad, the nodules occurring exactly 

 at the top of the hill. These beds were nowhere visible last summer, 

 but a little higher up in the series pebbly grit in a dark sandy 

 matrix was beginning to appear, with every prospect of a good 

 exposure shortly. To the south, the ironsands of Local Group 4 

 are seen, before the horizon of the Atherfield Clay is reached. 



A similar but more interesting section is exposed in Bunchbowl 

 Lane. Exactly 1 furlong south from the Beigate Boad at about 

 280 O.D. there is, in the west bank of the hollow lane, a fine 

 exposure of the pebble-bed in a dark sandy matrix, quite of the 

 usual character, fairly hard in places, highly false-bedded, with 

 lydites and quartz and other pebbles (including pebbles of clay), 

 corresponding in all respects with the exposures already mentioned 

 to the west (pp. 104, 106). This bed is seen to underlie typical 

 Folkestone Sand, but the beds which immediately underlie it are 

 not exposed. Since F. Drew draws a certain line for the base of 

 the Folkestone hereabouts/ I have little doubt that this is the 

 section from which he worked, although by the modern maps he 

 would appear to have drawn the line about | furlong too far south. 

 Considerable margin, however, must be given by a man working 

 with the existing 6-inch maps to one who had only the old edition 

 on the 1-inch scale. 



It is worthy of notice that the three observations here made of 

 this bed in the three lanes give a line which runs fairly parallel with 

 the outcrop of the Atherfield Clay up to the point where that outcrop 

 is cut off by the ' Bookery ' fault. To the east of Punchbowl Lane 

 the lower horizons of the Lower Greensand sink beneath the alluvium 

 and gravels of the Mole, and there are no further noteworthy sections ; 

 but the southern end of this hollow lane shows slightly clayey sands 

 over the beds of Local Group 4 (both capped by drift) just before 

 the outcrop of the Atherfield Clay is reached. 



The chief interest of this district is in the drifts which I have 

 twice mentioned as capping the beds of the sandy area. Dr. Hinde 

 refers in his paper 2 to the occurrence of fragments of chert at the 



1 Geol. Surv. Map, Sheet 8, Drift Edit. 



2 Phil. Trims Boy. Soc. vol. clxxvi. (1885) pp. 406, 409. 



