MEMOIRS 



OF TIIE 



GEOLOGICAL SURVEY OF INDIA. 



On the Geology of a portion of Cutch^ b?/ Wm. T. Blanpord_, Assoc. 

 Boy. School of Mines ; p. g. s. ; Deputy Superintendent, Geological 

 Survey of India. 



CONTENTS; 



1. — Introduction. 



2. — Route followed. 



3. — Details of observations. 



4. — Discussion of results : — Jurassic beds 

 — Tertiary beds, and Nummulitics — 

 Traps — Alluvial deposits. 



5. — Conclusions. 



The large proportion of these memoirs which has been devoted 

 to the remarkable groups of plant-bearing formations^ associated with 

 beds of coal in various parts of India^ will show how continuously 

 the attention of the Geological Survey has been given to these deposits. 

 A summary of the information obtained up to 1860 and 1861 respectively 

 will be found in Mr. Oldham^s two papers * On the Geological relations 

 and probable Geological age of the several systems of rocks in Central 

 India and BengaF (Vol. 11^ page 299), and ''Additional remarks on the 

 Geological relations,, ho.., Ua.' (Vol. Ill, page 197). 



Of the several divisions into which the various formations have been 

 classed, the two most important are those for which the Survey has 

 adopted the names — Damuda and Rajmahal. The age of the former 

 was shown to be, probably, upper palaeozoic, that of the latter to be 

 mesozoic, and, possibly, ' not newer than the lower Oolite/ 

 Mem. Geological Survey of India, Vol. VI, Art. 2. 



( 17 ) 



