54 CRETACEOUS ROCKS OF S. INDIA. [PaRT II. § 1. 



in situ, and embedded with the rock ou which they successively grew. The 

 accompanying wood-cut (Fig. 3) will serve to convey some idea of the ap- 

 pearance presented by this coral limestone. The mass represented is a small 

 isolated boss which occurs at Muddam, a few miles to the East of Tripatoor. 



Fig. 3. Boss of Coral-reef Limesto>ie kear Muddam, Tripatoor. 



The total length of the Tripatoor ridge is about half a mile. It is 



■p d 't t f <iivided in the middle by a small nullah, and in 



"^S®" the interval are deposited some soft grey shales 



much resembling those of the plant-beds, but which appear to belong to 



the Ootatoor Group. On the western half of the ridge they lap round 



the base, and are seen in a small field drain, rest- 

 Beds around it. 



ing against the highly inclined face of the rock at 



angles of 20° to 30°, with one or two lenticular calcareous bands at 



their base, enclosing a few pebbles of the limestone. About fifty yards 



from the limestone they are covered up by the coarse conglomerate that 



occurs at the base of the Trichinopoly Group, and this latter also is full 



of pebbles and boulders of the limestone. In the interval, between 



the two main divisions of the ridge, a small isolated boss of the limestone, 



which has probably been separated from the main ridge by denudation 



