GEOLOGICAL FORMATIONS, 



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Eocene 

 (Khiethab) 



The following- section, abridged from that given by Dr. Cook,! 

 shows the nature of the rocks between Kelat and Khozdar, the latter 

 place lying- about 70 miles north-north-west of the section on the upper 

 Gaj river : — 



Feet. 

 f 1. Compact white or reddish-white limestone containing 



Nummulites, Orbitolites, Orlitoides, Alveolina, &c. 

 (This is doubtless the Khirthar limestone.) Thick- 

 ness unknown; probably more than 1000 



Limestone strata, differing in character, compact, sub- 

 crystalline, saccharoid, at times cretaceous, containing 

 Nummulites (Assilina), Alveolina, and minute indis- 

 tinct Foraminifera, and passing downwards into 



coloured argillaceous strata ? 200 500 



More or less compact fine-grained red and white lime- 

 stone, interleaved with slabs of flint or chert, the upper 

 part containing one or two massive strata of an exces- 

 sively hard limestone, abounding in Orbitoides, Orbi- 

 MesozoIC . ,-i, tolina, and Operculina, the lower strata becoming ar- 



gillaceous and shaly, and containing (rarely) Ammonites ? 2,000 



4. Dark-blue fossilif erous limestone containing strata yield- 

 ing lead ore (galena and carbonate of lead) . . ? 2,000 



5. Clay slate ? 2,500 



It is true that the precise relations of many of these beds are far 

 from clear. Thus, in the valley of Kelat the red and white limestone 

 appears to underlie strata containing- OrtJioceratites. This may, however, 

 be due to faulting- or inversion. It is probable that several different 

 groups of beds occur near Kelat, for amongst the fossils, besides OrtJio- 

 ceratites, Ammonites of Jurassic types, Ceratites, Crioceras, Scaphites, and 

 Belemnites occur, and whilst some of the forms are typically cretaceous, 

 others can scarcely be newer than triassic. 



It is not impossible that the limestone bands in No. 3, containing 

 Orlitoides and other Foraminifera, may belong- to the tertiary series, and 



i Bombay Med. Phys. Soc. Trans, 1860, vi, p. 100. The bed numbered 2 in the section 

 is called upper cretaceous by Dr. Cook, but with a mark of doubt. This was perhaps in 

 accordance with the views as to the classification of the beds beneath the nummulitic lime- 

 stone formerly held by Dr. Carter, but subsequently modified by him. — See Jour. Bombay 

 Br. Roy. As. Soc, iv, pp. 93, 95 ; v, p. 635 ; and " Geological papers on Western India," 

 pp. 623, 626, 699, 700, foot-note, &c. 



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