GEOLOGY OF CENTRAL INDIA. 



35 



succeed in making myself understood, it is all I hope for. In describing 

 the newer classes of rocks, I shall endeavour to follow the arrangement of 

 CoNYBEARE and Phillips, an arrangement distinguished at once by its 

 simplicity and accuracy ; but, till the second part of their Geology of 

 England appears, to which every Geologist must look forward as the fu- 

 ture text-book of his studies, I must content myself with giving as 

 minute a description of the rocks of this district as I can, so that any one 

 who undertakes the task of drawing out a general Geology of India shall, 

 I trust, be able, from these descriptions, to class and arrange the different 

 rocks alluded to, after any system which he may chuse, and that the work 

 which has been so ably begun by Mr. Calder, shall soon be finished. 



In the above arrangement I have included only the rocks of the 

 district in which I am placed, in as far as I have had an opportunity of 

 examining them ; but I by no means wish it to be understood from this 

 that no other varieties of rock occur in the extensive tract under consi- 

 deration. — Such an assertion, the opportunities I have had of examining 

 it do not entitle me to make, and I shall reserve to myself the privilege 

 of adding to the number when occasion shall require. 



Probable limits of the primitive formation of Central India. 

 — I shall now proceed to offer a few hints relative to limits of the great 

 primitive formation under consideration. — I am sorry that most of my 

 remarks on this head are merely conjectural ; I offer them, however, 

 with the hope that they may prove useful to future observers, and that 

 their correctness or incorrectness will soon be satisfactorily proved. 



This tract, then, includes within its limits the northern part of 

 Guzerat, the greater part of the district of Bayur — the districts of 

 SeriU — Mewar — Marivar — Ajmer—iiXYnS. Jaypur — ^with, probably, portions 



