UPPER GONDWANAS. 25 



western slopes of the Tripati range of hills as a thin lenticuhir band 



A lenffcular band be- ^ or a length of some 16 miles, from the village 



tween the other groups. of Davanavargudem to within a short distance of 



Yadavol where it thins out, so that the over and underlying sandstone 

 groups come into superposition. 



There has been a good deal of local slipping or faulting in the out- 

 Local and recent dis- cro P s near Ragavaptirum, which, I think, are in 

 turbance in outcrops. great part of quite recent date> At firgt sigU ^ 



succession of the beds here is rather obscure, especially in the small hill 



east of the village, where a well-marked but thin sandstone band occurs 



in several stepped outcrops along the steep northern slope, but without 



any corresponding breaks in the coarse sandstones capping the plateau. 



It appeared to me that this series of step throws might be entirely due 



to occasional slips or slides of these same slopes which are very apt to 



give way owing to the clayey character of the rocks. 



At certain levels the series is crowded with marine shells of a few 



genera, with which, however, are occasionally 



Marine organisms. , J 



associated rare vegetable remains. The commonest 



fossil is the cast of a Leda, which is nearly always much crushed and 



distorted ; it is specifically undeterminable. 



Dr. Feistmantel x has determined the plants and some of the animal 



remains ; and he writes — " These beds overlie those 

 Fossil plants. 



of Gollapili, the flora of which has been also 



already described as the representative of the flora of the true Rajmahal 



group. The flora of the Ragavapuram shales is of a somewhat different 



character, containing some forms common to the lower beds ; and also 



some others, which are Jabalpur plants, or at least closely related to 



them.'" 



' ' The plants of the Kigavapiiram shales are — 



Fecopteris reversa, u. sp. The same form was also found in the Sripermatur group 



(Sripermatur area). 

 Angiopteridium (Tceniopteris) spathulatum, Schiinp. (McCL, sp.), Occurs in various 



1 Pal. Indica : Grohdwana Flora, Vol. I, p. 191 et aeq. 



( 219 ) 



