NERBUDDA DISTRICT. 199 



nearest to this eastern part of their area, are the true grits and conglo- 

 merates of the group, and the beds lithologically like the Lameta beds, 

 are found only far away to the west. 



Little satisfactory fossil evidence has as yet been attained from either 



of these series ; as has been stated, fossil wood only 

 No Fossils. . , , , , . , 



is known to exist in the Mahadeva rocks, and 



besides the silicified wood common in the Lameta beds, we only know of 



some obscure bones from near Jubbulpur, and a doubtful fragment from 



Karyia. Some of the Jubbulpur fossils have turned out to be vertebra?, 



probably reptilian, but as yet undescribed. 



§ 8. The " I?itertrappean ,} Series. 

 It has already been stated that the sedimentary rocks of this district 



Meaning attached to U P to the Lam * ta beds inclusi ve, have nowhere 

 the term. k een seen to rest on Trap, that is, as if they had 



been deposited there, but are, all of them, in many places covered, and 

 frequently disturbed by Trappean rocks. 



On the other hand the ossiferous (*) deposits of the Nerbudda valley 

 the clays, gravelly and loose sandstones, there so largely developed, have 

 no where been Seen covered by basalt. If then we consider the basal- 

 tic or trapDean period to be that geological era, during which the vast 

 accumulations of the Deccan trap were formed, it seems safe to assert 

 that it intervened between the consolidation of the highest of the Lameta 

 beds and the deposition of these ossiferous clays, &c. 



During this basaltic period and in the intervals of these great dis- 

 charges of lava, sedimentary deposits were formed at almost every part 

 of the basaltic area, at least almost everywhere within that portion of it 

 included in our map, and were again covered up by subsequent out- 

 bursts. 



* The Lameta beds are, of course, not included here, although bones occur in them 

 near Jubbulpore. 



