642 



MR. J. V. EISDEN ON THE SUPERFICIAL GEOLOGY OF 



detected in this section, and, after a long and careful search by Mr. 

 P. E-. Head and myself, no traces of any flint implements were dis- 

 covered. In 1881 a pit was opened near the windmill, in which, as 

 on Fittleworth Common and elsewhere, the deposit consists of two 

 distinct parts, angular gravel and an irregular bed of sand contain- 

 ing few flints (see diagram, fig. 4). Obviously connected with this 

 spread of gravel is another smaller patch on Kithurst Warren, at a 

 height of 150 feet above sea-level. In a small pit in the fir planta- 

 tion contorted stratification is visible, and the angular gravel over- 

 lies an irregular bed of sand containing only a few flints, and resting 

 upon an eroded surface of Lower Greensand. The junction is well 

 marked by a layer of ironstone and angular flints (see diagram, 

 fig. 5). No flint implements have been detected in these beds, 



Fig. 5. — Section at Cootham Firs. 



3. Angular gravel, with contorted stratification. 

 2. Sand, with a few angular flints. 

 1. Lower Greensand. 



which continue at intervals still further westward, reaching in 

 Parham Park an elevation of 200 feet. Although this last locality 

 is within a mile of the alluvium of the Arun, it does not seem 

 probable that these accumulations of flint-drift have any connexion 

 with the lower river-gravels of Wiggonholt and Greatham, beyond 

 furnishing some of the materials of which the latter are composed. 



Going eastward from Sullington Common towards the water- 

 shed angular flints abound everywhere, and sections of thin gravel 

 are plentiful above the 200 feet contour. This gravel rises to an 

 altitude of 300 feet at Longbury Hill, where it is seen much mixed 

 with large masses of ironstone. The best section in this patch of 

 gravel is on the roadside at Gravel-pit Plantation, where 5 feet of 

 ferruginous sandy gravel are exposed. Here there are very decided 

 traces of stratification, often slightly contorted. Seams of clayey sand 

 are intercalated with the gravel, and the base, consisting of sand 

 with only a few flints, rests upon an eroded surface of Lower Green- 

 sand (fig. 6). This gravel lies exactly upon the watershed between 

 the Arun and the Adur (see fig. 11, p. 656). Continuing along the 

 road from Washington to Steyning the ground again rises above the 

 200 feet contour near Lower Chancton Farm, and here again there 

 are small sections showing a thin coating of gravel of the same 

 nature as that of Longbury Hill. This patch of flint-drift appears 

 to extend past Buncton to Guess's Farm, but disappears on descend- 

 ing below the 100 feet level on the north. A striking feature of this 



