80 Mr Hardie's Outline of the 



rocks*. The newer sandstone of this district would also appear 

 to belong to a great series of rock formations, which has been 

 traced through a large portion of Hindustan, and which forms, 

 with but little interruption, the southern and northern barriers 

 of the valley of the Ganges and Jumna. This series is probably 

 continued on both to the north and south of the primary branch 

 just alluded to, making, on one side, a sweep into the Putijab, 

 flanking, in its course, the great Himalaya formations, and af- 

 terwards following a southerly direction through the districts to 

 the west of the AravuUi mountain plateau, which separates Aj- 

 meer from Marwar ; while, on the other side, the same series 

 may be traced into Harowteef , Malwa, and Meywar, where it 

 makes a deflection to the south, and is still seen skirting the 

 primary formations of the latter district, being interposed be- 

 tween them and the overlying trap of Malwa. On the border 

 of Guzerat, too, the same series may be observed ; and in this 

 portion of the country, the Meywar sandstones seem to take a 

 sweep eastward, so as to unite with the branch to the west of 

 the Aravulli plateau J. There is also every reason to suppose 

 that the above series is continued on across the Indus into 

 Persia. 



In the above general description are included the limestones, 

 and sahferous sandstones, which in some localities appear as the 

 surface- rocks. Under the former, and perhaps also under the 

 latter, the sandstones of the Gangetic series occur; but the 

 whole, undoubtedly, belong to one grand system of formations, 

 identical with the secondary class. Rocks of the transition 

 series, or argillaceous schist series, would also appear to be very 



• I use the word " transition" in compliance with custom, but with no 

 theoretical view. The distinction, in India, between the primary and tran- 

 sition series is, to say the least of it, exceedingly ill defined. I have been in 

 the habit of considering all the rocks of Rajpootana as members of one grand 

 formation, which, for the convenience of description, I have separated into 

 three subordinate series, viz. the granitic series^ the micaceous schist series^ and 

 the argillaceous schist series. 



f This word, by an error of the press, has uniformly been printed Parvis- 

 tee in my last communication. 



+ This rapid sketch will, I trust, in some degree fill up a hiatus in my 

 friend Mr Calder's excellent outline of the geology of India. See Transac- 

 tions of the Physical Class of the Asiatic Society, part first, p. 1. Ji^;j ]:„. 



