INTUODIKTION. 
152 
despatched him westwards to take samples of coal from the 
localities of riifciuland, Hahi, Kerabaliura, Kelliari, and liiohatola. 
The method of sampling adopted was, where possible, to take a 
vertical cut through the seam at its outcrop and to reduce the coal 
thus obtained to both smaller size and bulk by the ordinary methods 
of coning and ((uarteiing. The coal was often very dirty and 
wet, owing to its njode of occurrence, and in these cases the 
coal obtained was washed by hand and dried in the sun before 
being broken down. The results of the analyses of these samples 
carried out in the laboratory of the Geological Survey by Mahadeo 
Ram are given on pages 191, 192, 193, 199, 203, 206, and, in 
estimating their value, allowance should be made for the fact 
that they are outcrop coals only, and that when obtained from 
the interior of the seam the samples would probably show less 
moisture and a little less ash. 
In addition to the Barakar and Talchir divisions of the Gond* 
wana system my tour enabled me to examine 
Other foi'mations. i f i- r * i i i 
several of the muers oi i\rcha;an rocks namely, 
those of Phunga, Khargaon, Salba, Patna, Siroli, and Karimati — 
as well as the large sill and many of the dykes of Deccan Trap age 
indicated on the map. 
The most interesting point about the traps is that there is 
not, so far as I discovered, a single patch 
eccan lap. Deccan Trap of extrusive character, the 
irregular strip running E. N. E. across the State, being a giant 
intrusive sill. Both it and all the dykes examined are composed 
of dolerite of various degrees of coarseness, sometimes free from, and 
sometimes rich in olivine. 
The Archaean rocks examined consist very largely of granites, 
. , , gneisses, and schists, which can be matched, 
Arfhs&rin rocks 
nearly or exactly, with specimens collected 
in the Chhindwara district some 230 miles further to the W. S. W., 
indicating that the State of Korea lies on the eastern extension 
of the Archaean core of the Satpura Range. These outliers 
of Archaean rocks being of such variable composition and my ex- 
amination of them being cursory I do not projTose to enter 
into any detail in their description, but merely to enumerate the 
rocks found and state their resemblances to, and differences from, 
their nearest analogues in the Chhindwara district. 
