A. J. Jukes- Browne — Boring tJiroagh Chalk near Diepj^e. 25 



as 15°-30° from the vertical. This undercut furrow is distinctly 

 smoothed and striated. 



The trumpet-shaped mouths of the pits described in the foregoing 

 paper are beautifully ice-worn, though the heads of their sandstone 

 plugs are for the most part rough and angular. 



The stria?, are deflected on passing across the mouths of the pits. 

 In the case of one pit, about G feet in diameter, whose profile with its 

 plug is shown in Fig. 1, the strine sweep completely round in 

 the moat-like hollow surrounding the plug, until on its S.S.W. 

 side they are pointing more than 20° N. of W. These deflected 

 striae are shown, for part of their course, in the photograph^ 

 (Fig. 2). On the broad and gently convex surface of Limestone 

 just outside the hollow they have the normal direction S. 25°-30° W., 

 so that the deflection in the space of some 2 yards is nearly 90°. 



The agent which produced this phenomenon and that of the 

 undercut furrows must have adapted itself, it would seem, as 

 a practically plastic body, to every irregularity in the surface of 

 the rock. 



A Red Clay, somewhat poor in stones, rests upon the ice-worn 

 surface, forming a cliff about 12 feet high. 



VI. — Note on a Boring thuough the Chalk and Gault near 



Dieppe.- 

 By A. J. Jukes-Broavne, B.A., F.G.S. 



THE following particulars of a boring for water made at Puys, 

 near Dieppe, in 1S98 have been communicated to me by 

 Messrs. Legrand and Sutcliff, and as they appear to indicate a 

 succession of beds very similar to that occurring beneath Dover, the 

 present seems a fitting occasion for placing on record a brief account 

 of the boring. 



Puys is a small village less than a mile and a half north-east of 

 the entrance of Dieppe Harbour, and the site of the boring is at 

 an hotel by the sea- shore, the well-mouth being not more than 

 50 yards from high-water mark and about 45 feet above mean 

 sea-level. 



The beds passed through by the boring are described as follows, 

 the thicknesses being given in metres and in feet : — 



Metres. Feet. 



Chalk without flints 



Greensaud and sandy clay 



Gault clay 



Black sand and pyrites, passing down 



into clean quartzose sand Hi ... 37f 



211^ 693^ 



^ For this photograph and that illustrating the preceding paper, as well as for 

 the lantern slides and other photographs of these phenomena, used at the British 

 Association, I am indebted to Mr. J. Trevor Owen, M.A., Headmaster of the County 

 School, Carnarvon. 



* An abstract of only the first part of this paper was read before the British 

 Association at Dover, September, 1899. 



