308 A, Tylor on the Amiens Gravel. 
the sea, it gradually thins away until it is only 3 feet thick at — 
the south side of the railway-cutting, and soon merges into the — 
loess on the steep incline on the north side of the railway, 
The surface of the chalk at the Rue de Cagny near the point - 
I is 195 feet above the sea; it falls to 136 feet above these 
where it passes under the Imperial Road, and then | 
nearly horizontal, only falling 3 feet until it reaches the mil 
way-cutting. ; 
Fig. 1—Section at La Neuville, showing the Loess resting immediately” 
on the Chalk. ; 
The slope then becomes rapid again, and it probably falls at 
a gradient of 1 in 4 for some distance, and then becomes hor 
zontal again at the river Somme. : 4 
e loess is clearly seen in the railway-cutting and me 
cellar (Plate III, C)* in Neuville (fig. 1), resting oD 
without any intermediate gravel, C on the plan; but I ty 
left the junction between the loess and gravel undefined m BF 
lower part of the section IK, as I could not put the junction 
in accurately, Caza 
_ If a straight line be drawn from point I on the Rue ap 
to K on the Somme, it will pass 32 feet below the top de | 
railway-cutting along the line I K, and it will pass tes , 
chalk at the Imperial Road ata height of 17 feet, shows, : 
the surface of the chalk between those two points 18 pes 
Section L M.—(Plate IV, fig. 7.)—This 8 bee af 187 feet 
above the sea ; the gradient dips northward toward the nve, 
in 
Acheul pit, with a gradient of 1 in 15, 1 in 40, 1 meee a 
130. Here it crosses the Imperial Road and falls aos 
with a gradient of 1 in 600, 1in 500, 1 in 40, 1 2 0 
* The letter C in La Neuville must be distinguished from the it 
gueau on the same Plate III, 
