I<3 LAKE ; GEOLOGY OF SOUTH MALABAR. 



nected with the main dyke at all, it must be only as an offshoot. At 

 Manjeri, east of the bungalow, there are several parallel dykes form- 

 ing well-marked ridges. They are found also a little further north. 

 The direction is very variable, but the average must be about that of 

 the line of exposures. On the road between Pattambi and Cherpal- 

 cheri, near the 6th milestone (numbered from Cherpalcheri), this dyke 

 re-aoo^ars. About three miles further south it was again observed. 

 All these exposures lie in one straight line, and except at Wakalur, 

 the direction of the exposed dyke is about the same as that of the 

 straight line. There can be no doubt that they belong to one great 

 dyke or system of parallel dykes. 



The next large dyke is exposed on the flanks of Wallaiur (Wullia- 

 toor) Hill ; on the Kondotti-Ariakod road in the valley north of Kon- 

 dotti Hill ; on the Manjeri-Malapuram road, two miles from Mala- 

 puram ; and again about a quarter of a mile east of Perintalmanna 

 bungalow. The general direction is 35 S. of E. 



The third dyke is exposed about a mile south of the point marked 

 Clary on the map (two miles west of Kottakal) ; a mile west of Waka- 

 toor on the road from Kuttipuram (Kollypuram) to Kolattur (Colla- 

 tore) ; and two miles south-east of Tritala. The general direction is 

 52 S. of E. 



Finally, south of Anangamala, near Panamunnah of the map, is a 

 double dyke of considerable size running 43 S. of E. This has not 

 been seen in other parts of the district. 



There are, therefore, four chief dykes of this type of rock, viz. : — 



Manjeri 



dyke 



67 S. of E. 



Wallaiur 



i) 



35° S. of E. 



Tritala 



,, 



52 S. of E. 



Anangamala 



11 



43° S. of E. 



Besides these four large augitic dykes there is a fifth of con- 

 siderable size which crosses the Pandikad-Angddipuram road just 

 south of the PandikaM River. Its direction is 30 S. of E. 



There is a third kind of intrusive rock found in Malabar, of which 

 I have seen o^ly one example. This is found on the southern slope 

 of the ridge 1 inning easterly from Purrumulla Peak north of ManaY- 

 ( 216 



