PROCEEDINGS 



OF 



THE GEOLOGICAL SOCIETY OF LONDON. 



Vol. II. 1837-1838. No. 53. 



Dec, 16, 1837. — Levett Landen Boscawen Ibbetson, Esq., North 

 Kyme, Lincolnshire ; Charles Manby, Esq., John Street, Adelphi ; 

 and Colonel John Briggs, York Gate, Regent's Park, were elected 

 Fellows of this Society. 



Mr. Malcolmson's paper on the eastern portion of the Great 

 Basaltic district of India, begun on the 15th of November, was con- 

 cluded. 



The principal objects of this paper are to describe the eastern 

 boundary of the great basaltic formation of India, with its associated 

 stratified deposits, and to arrive at a proximate conclusion respecting 

 the age of the basalt. 



Extent of Country. — The region noticed generally in the paper, is 

 included between the 14th and 21st degrees of north latitude, and 

 the 75th and 82nd degrees of east longitude ; but the districts more 

 particularly described, are those watered by the Pennar river (lat. 14°), 

 the pass of the Sichel hills, near Neermul (lat. 19° 18', long. 79° 33'), 

 and the plains extending from the northern base of that chain to 

 Nagpoor. 



Physical Features of the Country. — The region forms part of the 

 great, elevated plateau which includes all the countries to the south 

 of the Nerbudda (lat. about 22° N.), and connects the provinces 

 watered by the southern branches of the Ganges with the Deccan. It 

 is traversed on the north by the Sichel or Shesha hiUs, locally called 

 the Neermul range, which extends from the junction of the Wurdah 

 and Godavery rivers (lat. about 18° 48', long. 80°), till lost in the 

 gradual rise of the country near Lonar (lat. 20°, long. 76° 30'). 

 The principal rivers which traverse the region are the Wurdah, the 

 Godavery, the Kistnah and the Pennar. The first flows north and 

 west of the Sichells, the second south of that chain, till its waters 

 unite with those of the Wurdah, when it takes a south-easterly di- 

 rection to the Indian ocean. The Kistnah flows nearly W. and E., 

 between the parallels of 1 6° and 1 7° ; and the Pennar traverses the 

 southern portion of the region (lat. 14° 30'). In the part watered 

 by the last river, a marked feature is presented in the horizontal sum- 

 mits of many of the ranges of hills, which appear to have been once 

 connected, though they are now separated by extensive plains. 



2 z 



