UPPER GONDWANA SERIES. . 81 



gravel which contains chipped stone implements. The great coarseness 

 of this conglomerate and its stratigraphical position both unite in sug- 

 gesting that it may be of the age of the immensely coarse Rajahmundry 

 conglomerates, recognized by Mr. King as equivalents of the Cuddalore 

 sandstones. The only difficulty in regarding the Ippatam conglo- 

 merate as representative of the Rajahmundry beds, lies in the con- 

 siderable distance between the two formations without any intermediate 

 link. 



It will have been seen in the foregoing pages that the beds which 



_. . ,. „ ^ _. niay, with good reason, be regarded as extensions 



Correlation of the Gun- ■»..-. 



tfir group with the Vem- of the Vemavaram group can be traced northward 

 avaram Budavada group. - f 



from Vemavaram for a distance of more than 20 



miles, and the evidence of the fossils obtained at Budavada, Dronadula, 



and Punur quite confirms the deduction made on stratigraphical and 



petrological grounds. Beyond this point petrological resemblance is the 



only guide in correlating the different groups of Rajmahal rocks that 



have been met with in the Guntur country. The petrological resemblances 



to the southern rocks found in these northerly patches justify the 



assumption that the triple sub-division found to hold good in the south 



may reasonably be extended to the north. The sandstones of Karti- 



chola and Kopparu, and the gritty beds of Guntiir, may be fairly classed 



with the sandstones of Annavallawarpolliam, Budavada, Punur, and 



Gannavaram ; while the shales of Ravipadu, Gorizagoluguntapalem, and 



Mutlur represent the Vemavaram shales, and the purple sandstones of 



Chebrolu and Tangellamudi represent the dark sandstones of the 



Pavulur group. 



The Upper Gondwana beds occurring north of the Kistna have been 



h > similarly divided by Mr. King (Records Geological 



Ongole Rajmahals with Survey of India, Vol. X, page 56; 1877) into 



Oodavari Eajmahals. ,,... „, .. 



three sub-divisions called respectively the — 



Tripetty sandstones- 

 Ragavapuram shales. 

 Gollapilli sandstones. 

 ■ T { SI ) 



