INTRODUCTORY. 19 



prevalence of pseudomorphic salt crystal casts, and by him placed high up 

 in the series, is the upper member of Dr. Fleming's Devonian according 

 to the sections given by the latter. 



Sufficient has been said to shew the important character of the 

 paper, the general conclusions arrived at approximating more or less lo 

 those of Dr. Fleming previously noticed. 



During a visit to the Punjab in the winter of 1859-60, Mr. Medlicott 



had an opportunity of seeing the relations of the 



H. B. Medlicott, 1859. -, n , r, , -r, i 



rocks at the eastern end of the Salt Range, and 



some of them are alluded to in his memoir upon the southern Himalaya 



between the Ganges and Ravi.* 



He observed a diiFerence between the grouping of the Subathu 

 series and that of the Salt Range nummulitic limestone and next succeed- 

 ing beds, certain hard sandstones and red clays of Subathu not being 

 present in the Salt Range where the massive unconsolidated mammali- 

 ferous clays and sands of the upper Sub- Himalayan (Siwalik) group are 

 stated to rest upon a denuded surface of the nummulitic limestone. The 

 great difference between the fossils of the two localities as enumerated 

 by D'Archiac and Haime is also alluded to ; out of forty-four species 

 from eachj none are common to both, and those of Subathu are of shallow 

 water forms as compared with those of the Salt Range. 



In describing the salt mines of Mandi and Drang, Mr. Medlicott 

 notices the presumption by previous geological observers that the salt rocks 

 of Mandi are beyond question the geological equivalents of those of the 

 Panjab (Salt Range, &c.). The position of the Mandi salt being, however, 

 fixed by Mr. Medlicott as well within the general boundary of his Krol 

 group,t and not in the Sub- Himalayan rocks, the clue which the latter 



* Memoirs of the Geological Survey of India, Vol. Ill, Pt. 2, "Subathu group." 

 Abstract on same subject. — Jour. As. Soc, Beng., Vol. XXX, p. 22. 1861. 



t Since Mr. Medlicott's memoir was written, the " Krol" rocks have been supposed of 

 triassic age, and the Mandi salt has been recently thought by Mr. Theobald (MS. commu- 

 laication) probably of eocene age. 



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