CONTENTS. 



Page. 



Art- 1. — On the Geological Structure and Relations of the Raniganj 

 Coal Field, Bengal. By "William T. Blaneord, e. g. s., 

 Geological Survey of India ... ... ... 1 



Preliminary Notice ... ... ... v. 



Part I. Geology of Raniganj Field. 



Chap. 1 History of the Geology ... ... ... ... 1 



II. General Topography and Geology .., ... ... 24 



III. The Talchir Group ... 32 



IV. §. 1 The Damuda Series ... ... ... ... 39 



„ §. 2. Lower Damuda Group ... ... .., 46 



„ §. 3. Ironstone Shales ... ... ... ... 74 



„ §. 4. Raniganj Group ... ... ... ... 77 



V. Panche't Group ... ... ... ... .. 126 



VI. Relations of the Panche't Group ... ... ... 132 



VII. Beds above the Panche't Group ... ... ... 138 



VIII. Trap dykes and intrusions ... ... ... ... 141 



IX. Faults ... ... ... ... ... ... 149 



Pakt II. Coal Mines. 



Chap. I. History of Collieries ... ... ... ... 154 



„ II. Mode of working, &c. ... ... ... ... 161 



Part III. Economic Geology. Summary ... ... ... ... 186 



Art. II. — Additional Bemarks on the Geological Relations and probable 

 Geological Age of the several systems of Rocks in Central 

 India and Bengal, by Thomas Oldham, l.l. t>., e. r. s., 

 Superintendent of Geological Survey of India ... 197 



Art. III. — Indian Mineral Statistics. I. Coal ... ... 215 



(Issued, September, 1861.) 



Art. IV. — On the Geological Structure and Relations of the Southern 

 portions of the Himalayan ranges, betiveen the Rivers 

 Ganges ^^Ravee,, by H. B. Medlicott, a b., f. g. s., 

 Geological Survey of India ... ... ... 1 



Page. 



Chap. I- General description of Area and Rocks ... 



II. The Himalayan Series 



III. The Sub-Himalayan Series — Subathu Groups ... 



IV. „ „ Nahun and Sivalik Groups 

 V. Post- Sivalik deposits ... 



VI. General structure of Hills ... ... 



VII. Economic Geology ... ... ... .,, 



Appendix. — On Theories of mountain formation 



(Issued, May, 1864.) 



1 

 21 

 74 

 101 

 152 

 160 

 175 

 187 



