204 ERBUDDA DISTRICT. 



ably in thickness, does not seem to have been even slight- 

 ly influenced by the superincumbent basalt. It rests on 

 6 to 7 feet of a mass which is made up of irregular lenticular 

 patches dying out and replacing each other, and which 

 differ from each other as follows — 

 («) A grey limestone somewhat like the bed above, but is more earthy, 

 and contains fewer shells. Though less calcareous on the whole, 

 it is traversed by many veins of pure carbonate of lime, which 

 do not occur in the upper bed. 

 {b) A fine grained green loam with an incipient concretionary struc- 

 ture, containing a few threads of carbonate of lime, no shells. 

 (c) The last named variety passes into this one ; the veins of lime 

 become larger, and highly crystalline, until the mass is a crys- 

 talline limestone, with a few flakes and strings of the green earth; 

 and these at last disappear. The limestone is a faint yellow or 

 drab color, and very coarsely crystalline. The facets of the crystals 

 have the pearly lustre of dolomite. (A bed similar to this is 

 seen near Babga, on the Jubbulpur and Mandla road, and a mass 

 not traceable to a bed was cut through in a well at Sagur.) 

 Beneath this comes trap, in a trough of which underlying flow all the 

 above beds seem to have been deposited : their out-crop does not extend 

 more than 200 feet in the line of section exposed by the stream ; nor 

 is there any reason to suppose that they. ever extended much farther. 



Many years ago Dr. Spry,(*) and subsequently to him Capt. Nicolls,(f ) 

 studied and described certain trunks of palm trees whose silicified remains 

 are found embedded in the soft intertrappean mud beds near Sagur. 

 Many points of considerable interest are involved in the descriptions and 



(6) This is given on the authority of Dr. Carter, vide Jour. Bombay Asiatic Soc. Vol., V. 



page 614. 

 (*) Journal of Asiatic Soc, of Bengal Vol. II page 639. 

 Ct) Journal Asiatic Soc. of Bombay, Vol. V. p. 614. 



