Chap. 1.] w. blanpord, western india. 3 



of a complete geological survey. The map which accompanies this report 

 is, therefore, in many parts merely a general (though, it is beHeved, an 

 approximately accurate) sketch of the geology of the country, similar 

 to the adjoining map of the Central Nerbudda valley by the late 

 Mr. J. G. Medlicott. The geological examination has necessarily been 

 somewhat unequal, more time having been devoted to the portions of the 

 country in which fair maps were obtainable, and where the geoloo-ical 

 ■formations were varied and important, than to those in which, owing to 

 the imperfection of the maps, detailed geological surveying would have 

 been simply waste of time, and in which the rocks are uniform in 

 character. 



In consequence of this inequality and of the large tract examined 



Arrangement adopted ^^^ pl^n adopted in describing the country in the 

 in the present Memoir. , j t m -i . « 



present report differs somewhat from that gener- 

 ally employed in these Memoirs. Instead of relating all the observations 

 upon each group of rocks under one head, it has appeared more advisable 

 in the first part of the report to give a general description of each form- 

 ation, of the rocks composing it, the area occupied by it, and its relations 

 to the beds above and below, and in a subsequent part, to divide that 

 country into the most natural and convenient sections practicable and 

 under each, to give such details as have been noted on all the rocks in that 

 division. A great advantage of this method is that any one interested 

 in the general geological description of the country will be able to learn 

 the views put forward without having to wade through a mass of details 

 while these latter, so far as they have been observed, will be found, for 

 each neighbourhood, collected under one head instead of being dispersed 

 under several : the latter plan, in a report relating to so large an extent 

 of country, rendering it, as the writer has often found, a matter of difii- 

 culty and requiring some time to ascertain what has been observed in 

 each special district. The present arrangement, it is hoped, will thus 

 render this report more easily available both to the student of the ffeoloo-v 

 of India in general and to local geologists. 



(165) 



