CHAPTER VI. 

 THE HUTAR FIELD. 



The remarks made on previous pages with reference to the general 

 physical structure of this field and its surroundings render it unneces- 

 sary to preface the following stratigraphical details with any further 



description of them. The area of the field is 

 Area. 



78'6 square miles. The different formations being 



exposed in the following proportions : — 



Mahadeva Series 14'1 square miles. 



Barakar Group 57'0 „ „ 



Talchir „ .7-5 „ „ 



78*6 square miles. 



Section I. — Talchiu Group. 



At the extreme eastern end of the Hutar field, rocks belonging to 

 the Talchir group occur at the base of the hills formed of Barakars, 

 and occupy a marginal zone of varying width and thickness. Immediately 

 under the Kande hill the deposit consists chiefly of boulder bed, which, 

 together with some associated shales and sandstones, attains a thickness 

 of about 200 feet. These are directly overlaid by from 250 to 300 feet 

 of Barakar sandstones and conglomerates. From hence, in a south- 

 westerly direction, the marginal zone can be traced only with great 

 difliculty owing to the covering of talus and dense vegetation. 



Although I have represented it on the map as being continuous up 

 to the Dauri river, I am doubtful about its being really so, as in several 

 places the gneiss appeared to interrupt it, occurring up to elevations of 

 about 100 feet on the slopes and being apparently directly covered by 

 Barakars; but a distant view of the hill face stretching from Kande 

 to the Dauri, obtained when the jungle had, for the most part, put on 

 its yellow and brown tints, leads me to suppose that the Talchirs may 



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