32 BLANF0RD : GEOLOGY OF WESTERN SIND. 



List of geological formations occurring in Western Sind. 



Groups. 



Sub-divisions. 



Approximate 

 thickness. 



Supposed 

 geological age. 



Remabks. 



8. Alluvium, &c... 





? 



post-tertiary. 





7. Majtchhae 



fupper 



J 



5,000 



pliocene 



Unfossiliferous ; apparently 

 representative of the fos- 

 siliferous Siwalik group. 





1 



Uower 



3,000 to 5,000 



lower pliocene or 

 ■upper miocene. 



Fossiliferous, containing 

 chiefly Vertebrata. 



6. Gaj 





1,000 to 1,500 



miocene 



Highly fossiliferous; 

 marine ; no nummulites. 



6. Nasi 



(upper 



( lower 



4,000 to 6,000 

 100 to 1,500 



lower miocene ? ... 



upper eocene or 

 oligocene ? 



Unfossiliferous. 



Fossiliferous; upper lime- 

 stone with nummulites. 



4. Khiethae 



("upper 



(.lower 



600 to 3,000 

 6,000 ? 



eocene 

 eocene 



Nummulitic limestone. 



The lower beds unfossili- 

 ferous. Base not deter- 

 mined. 



3. Raitikot 





2,000 



lower eocene 



Fossiliferous. Nummulites 

 still common. 



2. Teap 





40 to 90 



lowest eocene or 

 upper cretaceous. 



Representative of the Dec- 

 can and Malwa trap. 





(a. Cardita Beau- 

 ■ monti beds 



350 to 450 



tipper cretaceous or 

 intermediate between 

 eocene and cretaceous. 





1. Cbetaceous 



•! 6. Sandstones ... 



700 



cretaceous 







c. Limestones with 

 I. hippurites. 



X 320 





Base not exposed. 



On the river Gaj, a thickness o£ at least 25,000 feet of strata is 

 exposed, none of the fossiliferous beds being of 



Total thickness. 



older date than eocene ; but some of the unfossili- 

 ferous rocks towards the base of the section beyond the Sind frontier corre- 

 spond so well with the description given by Dr. Cook 1 of strata in which he 

 found mesozoic fossils {Ammonites, &c.) in Kelat, that these bottom beds on 

 the upper Gaj, which are only seen west of the British frontier, may very 

 probably be of cretaceous age. There is, however, no resemblance between 



1 Trans. Med. Phys. Soc. Bombay, I860, vi, pp. 1, 45 ; Carter, Jour. Bombay Br. Koy. 

 As. Soc, vi, p. 184. 



( 32 ) 



