202 Dr. PiTTON on the Strata below the Chalk. 



2370. Biddlecomhe' s Chine ; clifFon the east of it, about 25 feet high. 



2400' — 2410. A strong sand-bed rises to the middle of Complon-Grange Chine, on the north-west 

 side. 



2410 — 2552. All reddish and variegated clay ; diluvium still at top. 



2462 Middle of " Compton-Grange Chine." 



[On the shore, at the mouth of this Chine, are large masses of angular, grey and yellowish, 

 flint fragments, cemented by ferruginous matter. The coast from hence to Brook Point runs 

 out uniformly in the same direction.] 



2552. A strong band of reddish sand-rock ; goes out at 2615. 



2582 — 2658. Reddish and greenish clay and sand. 



2658. A bed of sand-rock rises ; under it is reddish matter, but concealed on the shore. 



2694 — 2700. A bed o^ sand-rock rises, about 4 feet thick, with reddish stains and spots, like those 

 of the new red sand-stone. 



2700 — 2822. Dark red and variegated marly clay seems to occupy all this space. 



2843 — 2855. A bed of fine-grained sand-rock, which forms a ledge in the sea, (the first from 

 Compton-Grange Chine) rises about 2843, and goes out under the diluvium at the top of the 

 cliff, about 3000, very near to Brook Point. It may possibly be the same with that which re- 

 appears on the other side of the point, and crosses the upper part of Brook Chine. 



2855 — 2952. Variegated, wine-red and greenish, cohesive sand, not effervescent, occupies this 

 space on the shore, and forms the upper part of the Point and nearly the whole of the cliff below 

 the diluvium thence to near Brook Chine. 



2952 — 3030. A group, consisting of sand and sand-rock, with concretions of subcalcareous grit. 

 This forms the base of the Point; and the upper beds of the group seem to go down, beneath the 

 variegated sand of the last-mentioned stratum, between the Point and Brook Chine. The boat- 

 men informed me that some of the ledges of sand and sand-rock run out several miles into the 

 sea from this part of the coast. The lower part of tliis group includes, in great numbers, large 

 trunks of petrified coniferous wood*, frequently of a dark brown colour, penetrated by car- 

 bonate of lime and effervescing abundantly with acids ; the cracks by which they are traversed 

 being filled with the same substance. At very low tides, compact variegated sand, like that 

 which abounds on other parts of this coast, appears below the sand-rock of the Point, and 

 seems to be the lowest visible stratum of the island. 



The extremity of Brook Point is about 3060 paces from the rise of the Gault under Afton 

 Down, measuring along the shore ; thence to the Chine tlie shore turns inwards a little towards 

 the east, and the distance is about 830 paces ; of which about 250 are occupied by the sand- 

 rock of the Point, beneath the variegated clay. About 320 paces from the Chine a bed of firm 

 sand-rock rises, and crossing the upper part of it, forms a slight curve : it is, in fact, a con- 

 tinuation of that already mentioned, which rises about 300 paces on the south-west of the Chine. 



3890. The middle of Brook Chine is about 3890 paces, reckoning round the Point, from the top 

 of the Gault under AftonDown. 



(102.) Fossils of the Beds below the Chalk in the Isle of Wight. 



[Upper Green-sand.'] 

 Ammonites cinctus. East End. In grey marly chalk, with few green particles. 



A Mantellii. Western Lines. Some of the specimens compressed into 



ovals. 



* See Webster's Isle of Wight, p. 153—4. 



