1846.] PIIESTWICH AND MORRIS ON THE WEALDEN STRATA. 4*01 



a mile, at a short section of twenty feet deep, consisting of soft fri- 

 able sandstone imperfectly exhibited, and at a similar distance be- 

 yond it commences another good and long section through the hill 

 north of the Powder Mills valley (fig. 3). 



At the north end of this section the dip is reversed in the oppo- 

 site direction from that which prevails at the Quarry Hill section, 

 being about two degrees to the south. The lowest beds here ob- 

 servable (D) present some peculiar features; they form about fifteen 

 feet of soft argillaceous sandstones, of a dirty white colour*, whose 

 stratification is rather irregular and confused, and the beds appear 

 not to be perfectly conformable to those of the overlying stratum C 

 (fig. 3). 



This latter consists of twelve feet of massive sandstone, with sub- 

 ordinate soft white argillaceous bands, and with a very slight under- 

 lie of pebbly grit, possibly representing C at the Quarry Hill sec- 

 tion, since the same fossils, although rare and consisting only of a 

 few impressions of Cyrena and Unio, are occasionally repeated in 

 eachf. Superimposed upon these are thirty feet of dark shales and 

 clays, which we could not distinguish either by organic remains or 

 iithological character from the Cypriferous shales (B) of the first 

 section. They are laminated and shaly, of a dark bluish grey co- 

 lour, with occasional green tints. They contain in abundance the 

 Cypris Valdensis, and present several bands of impure concretionary 

 limestones full of casts of Cyrena media, Paludina elongaia, &c. 



Proceeding across the valley for about half a mile, the railway 

 section cuts through the east end of Southboro* Hill, and exposes 

 about twenty feet of soft, marly, red and ferruginous sandstone, with 

 subordinate beds of whitish sand and red clay overlying fifteen feet 

 of green and dark grey shales (E), the position being nearly hori- 

 zontal. For reasons hereafter given, we consider it doubtful whe- 

 ther these beds are a continuation of the shales described in the last 

 section. The following is the sequence at this spot, given in de- 

 scending order: — 



3. Yellow clay and imperfect sandstone. 

 Whitish sand and clay. 



2. Soft yellow and ferruginous sandstones only occasionally massive, with 

 black partings, mixed and imbedded in reddish clay, with small con- 

 cretionary fragments of ironstone. The lower part of this stratum 

 at the south end of the cutting passes into red clay and small iron- 

 stones only, with an underlie of grey clay full of irregular matter. 



1. Shales and clays. South end — upper part green, then whitish, passing 

 down into dark grey. As this bed trends northward, all the upper 

 part becomes of a dark grey, passing down into a light greenish 

 grey. Contains thin sandstone slabs covered with vermiform im- 

 pressions, but no organic remains. 



Between this point and the Tunbridgc Wells section are three 

 small cuttings, the first of which is similar in structure but not so 



* From their general Iithological character and position, this stratum (D) may 

 correspond with the top of stratum 1) at the Quarry Hill section. Organic re- 

 mains are extremely scarce at both localities, and attbnl no evidence. 



t There are a few vegetable remains which also appear to be similar, but are 

 equally indistinct. 



