46 VR5DENBURG : RECENT ARTESIAN EXPERIMENTS IN INDIA, 



Boring at Chandernagore. 



An experimental boring has also been put down at Chander- 

 nagore. The boring reached a depth of 242 feet 

 without finding water. The results have been 

 published by Mr. Oldham in the Records of the Geological Survey 1 

 and are reprinted below. On the subject of this section Mr. Oldham 

 has written the following remarks :— 



"The section requires but little comment. The bed No. 13 is- 

 evidently the equivalent of the peat bed found near Calcutta at 

 depths of from 30 to 35 feet ; No. 32 is peculiar as containing 

 numerous sub-angular fragments of felspar which must have been 

 derived from some exposure of gneiss or granite in the neighbour- 

 hood, which has since been covered up by alluvium owing to the 

 subsidence which has taken place in the Gangetic delta ; the speci- 

 men also contains a fragment of bone, apparently of a turtle, con- 

 verted into oxide of iron." 



Tableau indiquant le nombre et la nature des couches rencontrees 

 pendant le forage du putts artesien de Chandernagor. 







Thickness. 



Depth. 



Thickness. 



Depth. 





Metres. 





Feet. 





No. 1. 



Terre ve'getale . . 



080 





2-62 





n 2. 



Sable fin micac£ d'un blanc sale 

 mele de coquilles et de nodules 

 calcaires .... 



i - 35 



215 



4-42 



7°'S 



u 3- 



Sable fin micac^ d'un blanc jau- 

 natre mele legerement de 

 nodules calcaires . 



o-45 



260 



> - 47 



£52 



„ 4. 



Sable fin micace 1 d'un jaune 

 rougeatre .... 



0-25 



2-85 



•82 



9'34 



1, 5- 



Sable fin micace" d'un blanc 

 jaunatre .... 



030 



3'iS 



•98 



I0'32 



" On a deep Boring at Chandernagore ". Rec. Geol. Surv. Ind., Vol. XXVI, pp. 100-102. 

 ( 46 ) 



