Memoirs of the Geological Survey of India

Section 2 extends from the Tikiria Nullah, on the Northern boundary of the field, to Gopalprasad, where it shows the relations of the carbonaceous shales to the accompanying rocks ; and thence the section extends to the Southern boundary of the field at Jorasinga. [...] Several interesting notices of the extent to which the ancient temples and other buildings of the district have been invaded by the sands of the shores of the Bengal Bay will be found in this valuable paper ; and the curious legend, by which the occurrence of the sandstone hills of Khandgiri, said by Mr. [...] Time did not permit of any of the gentlemen of the Geological Survey visiting this district during last season; but I may add, that Captain Saxton, having had the advantage of going over some of the Talcheer country with the Officers of the Survey, stated that this Gangpur coal was not in the least more promising than that of Talcheer. "1 0 PRELIMINARY NOTICE ON THE tain the real state of the case, [...] the oxygen of the air with the carbon of the charcoal, forming carbonic oxide (Co or C. ) The ores used being, as we have already explained, almost exclusively composed of the peroxide of iron and silica, the ash of the charcoal, left free by the separation of the carbon, takes up a proper proportion of the silica of the ore, leaving still the larger portion. [...] A portion of the remaining protoxide of iron is again further resolved into oxygen and iron, the oxygen, as before, uniting with a further proportion of carbonic oxide, and passing off in the state of carbonic acid, and the iron remaining ; while the other portion of the protoxide unites with the unreduced silica and forms the silicate of the protoxide of iron.