155 FERMOI? : GKOLOGY AND COAL RESOURCES OF KOREA. C. P. 
The following is a list of the geological formations represented 
in this State : — 
1. Deccan Trap (intrusive). 
2. Gondwana 
^ , . , , (a) Supra-Barakars. 
Geological iormations. ,/> n i 
[b) Jiarakais. 
(c) Talchirs. 
3. Archaean. 
A reference to the geological map (Plate 31) will show that 
iu a general way the geology of Korea corre?- 
or'ttrraSr ^'^^^''''"^ ponds with the division into three plateaux 
or steps as given in the foregoing quotation. 
The lowest plateau, that of Patna and Khargaon, is largely occu- 
pied by the rocks of the Talchir formation, through which the 
underlying foundations of Archaean granites, gneisses, and schists, 
appear as several inliers ; whilst on it rest two outliers of the 
Barakar rocks, comprising the Kurasia and Koreagarh coalfields, 
rising to elevations of 2,917 feet in Bartunga hill (see Plate 21) 
in the former field and 2,985 feet in Koreagarh. These two coal- 
fields are outliers of the second or Sanhat plateau, the extent of 
which coincides almost exactly with that of the Barakar rocks 
forming the northern coalfield, to which the name Sanhat coal- 
field thus seems peculiarly applicable (see p. 150). The elevation 
of the second plateau is given as 2,477 feet, the height of Sanhat, 
but places at a lower level, such as Ghutra at an elevation of about 
2,000 feet, must also be regarded as lying on this plateau. The 
third or Deogarh plateau corresponds with the wide spread of 
Gondwana rocks designated supra-Barakars and regarded by Hughes 
as of Mahadeva age. Capping Koreagarh and the hill known as 
Doman Pahar (2,650 feet approx.) about 2 miles south of Kurasia 
are two patches of these supra-Barakars, which may be regarded 
as outliers of the third plateau. 
