8 GEOLOGY 01- SIND. 



My visit was so liurried, and I had so little previous acquaintance 

 witli the nummulitic rocks of Western India^ that I can only indicate the 

 opinions to which I should incline, especially as they appear to differ 

 slightly from Captain Vicary^s. If, as aj)pears prohable, the limestone of 

 the Eri Range be the No. 8 of that officer's section, I am disposed to 

 believe it the equivalent of the rocks of Kotree, but which Captain 

 Vicary referred to his No. 6 (see appended sections). This, however, is 

 a subject which requires further investigation. Still the circumstances, 

 that the limestone of Kotree is exactly similar in character to that of 

 Hunneekote, that both abound in Alveolina, and that both overlie the 

 same series of sands and clays without, at least, any great unconformity, are 

 strongly in favor of their identity. The absence of the highly fossili^ 

 ferous beds seen east of Lynyan at Runneekote does not necessarily 

 prove unconformity between the sands and clays of the Vira plain and 

 the alveolina-limestone ; the lower portion of the latter in the Eri Hills 

 may represent the yellow limestone of Lynyan. 



It is, however, very probable that a break in the series exists be- 

 tween the clays and sands and the alveolina-limestone. The latter is not 

 only marine, but probably a deep-sea deposit. The sands and clays are 

 not only deficient in marine fossils, but they abound in the remains of 

 plants ; and if they are not of fresh-water origin, they must be estuary 

 or coast accumulations. The limestones of Lynyan, on the other hand, 

 were not necessarily deposited in very deep water; many of the 

 contained shells are shallow- water forms. 



If, then, there be a break in the series between the limestone and 

 the underlying beds, the age of the latter remains to be determined. 

 The only recognisable fossils which I met with were some leaves of plants 

 in a bed of argillaceous shale at Runneekote. They were all dicoty- 

 ledonous, which is in favor of the tertiary age of the clays and 

 sandstones. 



