10 
Records of the Geological Survey of India. 
[vol. v. 
yards long by about 30 yards wide and 50 feet deep. There are also some old workings 
some quarter of a mile distant, where large excavations have formerly been made. The 
mines at Mungela, and at Agorea in the Mnjgoan hills, and also in the hills west of the 
Marble rocks, are all situated on the same geological horizon, and the denosit of iron ore 
would appear to be very constant, and to offer a practically unlimited supply of the very best 
quality of ore. Small traces of copper and lead have also been found, but nowhere in 
quantity which appeared to offer any prospect of working them to profit. 
Mr. Ball, who, as stated in last year’s report, bad proceeded to the south of Chota 
Nagpore and Sirgujak, completed last season a most admirable and largely extended re- 
connoissance of a very extensive area. As stated then, there were gaps, for which no maps 
or surveys existed, so that detailed work was impracticable. Bat Mr. Ball has in a very 
satisfactory way obtained an approximate knowledge of the limitation of the various series 
of rocks, which will prove of the greatest service, when detailed examination can be taken 
up. And all this in a country where soarcely a road exists, and where it was essential to 
travel with the least possible amount of comfort. I am happy to be able to report that 
Mr. Ball has not suffered in health from his sojourn in these jungles, generally reputed 
very unhealthy. This season, Mr. Ball (taking with him Mr. James Willson, who, 
having only recently joined the survey, required initiation into the peculiarities of the 
various groups of rocks), has taken up the more detailed examination of the north-western 
extremity of the Chota Nagpore country, of which the survey maps have been published. 
Mr. Ball was absent for three months on privilege leave during the recess, a holiday which 
he had well earned. 
In Burmah, Mr. Theobald was more especially engaged in the examination or rather 
re-examination of the Arakan range of the Yoma. The peculiar relations of the altered 
rocks seen towards the centre of that range with the unaltered nummulitic rocks which 
occur in the flanks, to which Mr. Theobald has directed attention in papers published in the 
Records of the Survey, were still on many points open to doubt and question, and to de¬ 
termine these questions, Mr. Theobald crossed the range in several places right from the low 
ground of the Irrawadi to the sea coast. By these traverses ho has satisfied himself that, 
notwithstanding the remarkable alterations to which the rocks occurring along the axis 
of the range have been subjected, they belong to ono and the same series as the undoubtedly 
nummulitic rocks seen on their flanks. Mr. Theobald also paid special attention to the 
brine springs of British Burmah, of which he has submitted a list, which will soon be given 
in the Records of the Survey, The great deficiency in detail and accuracy of the maps 
of British Burmah which we have to use, and the densely jungly nature of these less fre¬ 
quented portions of the country, must for generations render the close geological examination 
of the area quite impracticable, and all that can be looked for is such a general sketch of the 
geological structure as will give a tolerably accurate idea of the relations of the several 
rocks. 
Mr. Wynne, who during the preceding year had completed the examination of the 
eastern portion of the salt range in the Punjab, worked out the western part of the same 
area in considerable detail, and is now engaged in the country lying to the north of this 
range, and extending up to Attock, IIossein Abdal, &e. The strangely disturbed condition 
in which the rocks of the salt range are found, due not only to distinot faulting and disturb¬ 
ance on a large scale, but also to almost countless slips of enormous size along the bold 
scarp to the south,—resulting in a complicated arrangement of the several rocks, so 
intricate that it would be impracticable to make it intelligible without careful plans and 
sections—rendered it perfectly essential that the greatest care should be devoted to the proper 
