Woolwich 

 and 



PRESTWICH WOOLWICH AND READING SERIES. 105 



Well-section, New Cross. (PI. I. Diag. C, Loc. sect. 8.) 

 (Mr. R. W. Mylne.) 



Feet. 



London J Yellow clay 10 



Clay. [Blue clay 13 



i. Shells in sand 10 



A. Hard shells 3 



ff. Sand with water 1 



y. Sand with shells 15 



•j e. Shells and clay mixed 5 



I d. Sand 1 



c. Hard shells in sand 2 



b. Pebbles 15 



[a. Green sand 2 



III. Thane i J Havd sand 14 



5ara<^s. \ Sand 34 



125 

 Chalk 25 



To the band of freshwater limestone, attention has been called by 

 Mr. Warburton*. It is full of the following fossils : — 



Melanopsis buccinoides, Fer. Teeth, bones, and scales of Fishes. 



Paludina lenta, Sow. var. a, Mor. Unio (Deshayesii, Wat. ?). 



Hydrobia Parkinsoni, Mor. Traces of vegetable impressions. 



The JJnio has only been found at a very short distance to the E. 

 and W. of this place. The Paludina, which can scarcely be distin- 

 guished from the Isle of Wight species, hardly exceeds the limits of 

 this area : it has been found however as far north as Limehouse. 

 Beneath this bed are clays and sands also containing a somewhat 

 diiferent group of fossils. The following is a list of those which I 

 collected during the cutting of the railway : — 



Area depressa. Sow. Modiola Mitchelli, Mor. 



Calyptrsea trochiformis. Lam. Ostrea BeUovacina, Desh. 



Corbula Regulbiensis, var. /3, Mor. tenera. Sow. 



Cyrena cuneiformis, Fer. Hydrobia Parkinsoni, Mor, 



cordata, Mor. Cypris ? 



deperdita, Sow. Bones and scales of Fishes. 



tellinella, Desh. 

 Cerithium variabile, Desh. Cythere, sp. 



Melania inquinata, Desh. Foraminifera (last 3 sp. in list, p. 118). 



Melanopsis buccinoides, Fer. 



To the above specimens may be added the following species from 

 the Counter Hill pits : — 



Pectunculus terebratularis. Lam. Psammobia Condamini, Mor. 

 Planorbis laevigatas, Desh. Impressions of plants. 



When these vipper beds contain subordinate seams of pebbles, it 

 becomes difficult to separate them from the " Basement-bed of the 

 London Clay," which reposes upon this division in a very irregular 

 manner. 



At Woolwich no line of separation can in the present section be 

 drawn between the great mass of shingle, which I presume belongs 

 to the Basement-bed of the London clay, and the fossiliferous pebbly 

 sands ; but about twelve or fifteen years since, when the section 



* Journ. Geol. Soc. vol. i. p. 172. 



