460 Mr. P. J. Martin on the Anticlinal Line of 



tertiary, a pit of which was some few years since open by the road 

 side near the nursery garden. Further west, at Crocker Hill 

 and Boxgrove, the angular tiints are largely mixed up with eocene 

 shingle, and so it continues on to Goodwood. At West Hamp- 

 net they are closely impacted with clays derived from the stratum 

 above mentioned. Further on, between the workhouse and the 

 city, close by the Lavant, and near the public-house at the turn- 

 ing to Goodwood, a pit was open three or four years ago, from 

 whence flints were turned out with so much chalk-rubble about 

 them and so white as to look like chalk-stones. I have not seen 

 anything like it except at Brighton, and under the Downs at 

 Boxhill in Surrey. Further west in the Portfield the gravels are 

 again smaller and more washed. At Rumboldswick, again, they 

 become larger, and the same in the direction of Donnington and 

 Appledram, and are here again mixed and impacted with the 

 subjacent clays. South from these points the surface of the 

 Manwode country is chiefly tertiary clay and sand, till the 

 boulder-drift falls in from the coast. 



If any stress be laid on the diff'erence of colour in these gra- 

 vels as indicative of their age or of their sera of formation, let it 

 be admitted. The flints by the side of the Lavant are not so much 

 pounded as those at the West Hampnet brick-yard, where they 

 are for the most part broken into small fragments and impacted 

 with clay-loam ; and they are white, because they have not been 

 washed out of the chalk rubble that surrounds them. Even 

 their superposition, if it be clearly made out, argues nothing 

 more than that they have been outspread after the washing, 

 smashing, and impaction of the brown (brown because mixed up 

 with ferruginous) clay, near or on which they lie. Unwashed 

 flints are spread out in like manner at Brighton, in the valley of 

 the Mole near Boxhill, and on the outskirts of the foot of the 

 North Downs from Dorking to Keigate ;— and are here and there 

 to be found in chalk-rubble drift on the plateau of the upper 

 greensand in West Sussex. This white gravel, if it may be so 

 called, was brought into notice in my former publication on ter- 

 tiary drift (see Phil. Mag. for October 1851) ; and its super- 

 position, be that granted, argues nothing more than another 

 diluvial sweep, — else, why is it, and how came it there ? 



West of Chichester, towards Emsworth and the foot of Ports- 

 down Hill, the same features are observed, more brick^earth 

 and clay-impacted gravels, the stratified London or Plastic clays 

 appearing here and there on the surface. From this part of the 

 country, along the Forest of Bere, and skirting the Downs, this 

 band of angular flint-gravel, sometimes loosely and sometimes 

 closely bound together, and mixing with eocene shingle, crosses 

 over the chalk-dome of the Alton Hills, and uniting here and thqre 



