76 



TTYNNE : GEOLOGY OF KUTCH. 



[part I. 



Mottled, white, iron-stained, streaky, fine silty 

 sandy shales, soft and friable, obliquely laminated, 

 irregularly bedded and often lenticular; contain 

 1 impressions of leaves ... ... ... 100 feet. 



Dun colored and blue silty clays and blue shales j 

 ^contain the carapace of a minute crab; &c. ... 30 feet. 



f Marly beds with a few fossil casts and nummu- 

 lites in lower part. 

 Nummulitic marls and limestones ... ... 700 feet. 



r (?) Operculina gypseous shales with nodular bands 

 B-! and laterite above and below. An oyster bed some- 

 Ltimes on this horizon ... ... ... 100 feet. , 



Finely laminated shales, upper part rusty brown and friable ;' 

 lower argillaceous and bituminous and pyritous, with small 

 lumps of mineral resin, bitumen, &c. 



Small horny plates, possibly belonging to a crustacean, and 

 woody fragments and leaf impressions best preserved in the 

 lower part. 



600 to 800 ft. 



Total 1,600 to 2,600 ft. 



Portion of the group 

 succeeding the volcanic 

 looking sub-nummulitic 

 beds. 



The last-named beds are intimately associated with, and sometimes 

 appear tfl form a part of the sub-nummulitic division with its mottled 

 lateritic and (?) volcanic beds. 



A. — The fossiliferous and shaly portion of this group is inconstant, 

 and not found in more than a few places. The 

 contained leaves are of several kindsj both exogen- 

 ous and endogenouSj occurring locally in great 

 numbers^ generally small and lanceolate, but 

 sometimes of large size ; the fine deposits which contain them may have 

 been local river, lacustrine, or estuarine, accumulations. 



B. — This is also a band of comparatively local character, occurring 

 just beneath the nummulitic group round the west- 

 ern curve of the beds which flank the Gaira hills, 

 and in a few other places. Its nodular claystone and marl bands and 

 some of the shales are full of little N^immulites and Operculina, and a few 

 other marine fossils, such as Corhula, Ostrea, &c., the latter chiefly in the 

 upper part ; and they also contain bones, reptilian remains and fish 

 ( 76 ) 



