170 CRETACEOUS ROCKS OF S. INDIA. [PaRT II. § 2. 



escarpment does not coincide with the boundary of the formation which 

 passes below it a Uttle to the "Westward. 



A large outlier of Cuddalore sandstones occupies the high patch of 



jungle to the East of Pulliyur (Paroor of Mr. 



Paroor outlier. ^ , »» • \ mi i i • i- e 



Kaye s Memoir). Ihe beds, consisting ot coarse 



ferruginous grits, are seen ia the bank of a little jungle road leading 

 Eastward from the village, and masses of ferruginous grits are seen 

 strewn over the surface between that village and Veramamir. Further 

 North nothing is seen in place, owing to the thick covering of red soil 

 and laterite, on which the Acacia jungle grows very thickly ; and 

 the boundary is drawn partly in accordance with the form of the 

 ground, and partly with such indications of the presence of the Cud- 

 dalore beds as are afforded by their lateritized fragments strewn on the 

 surface. 



To return to the main formation : at Motepolliam a fine section of the 



Main formation-Mote- l^wer beds is seen in the bank of the waste chan- 

 polliam. j^g^ ^^ ^jjg North-east corner of the large village 



tank. But neither here nor elsewhere in this part of the country, is the 

 absolute junction of the Cretaceous beds and Cuddalore sandstones 

 exposed. At the bottom of the section is a coarse sandstone, which is 

 followed by a band of hard white sandy clay, (or rather sand of extreme 

 fineness, as it has no plasticity,) irregularly interbedded, and at the top 

 is a conglomerate also very irregularly deposited, and containing, not only 

 pebbles of gneiss and quartz but also of the white sand itself which 

 immediately underlies it. Such occurrences are not uncommon in beds 

 of irregular deposition, and I have noticed a similar phenomenon in the 

 Talcheer beds of Cuttack. I have never met with an}'' clay resembling 

 the above in any part of the Cretaceous rocks ; and I cannot doubt that 

 although the clay and conglomerate beds belong to the same formation, 

 the former was the source from which the clay pebbles in the latter were 



derived. 



