Chap. IV. 1.] metamorphic eocks. 67 



west of the village of Siugipooram. At Singipooram five beds of iron ore 

 appear on the western slope of the small hill_, bearing the same name as the 

 village ; only three of these appear to the west on the slope of Ponna- 

 rompiitty hill, and here two are apparently cut off by a fault, the line of 

 which is occupied by a small trap-dyke, having a north-north-east course. 

 To tlie east of the village the iron beds are almost immediately lost sight 

 of under thick soil, and do not re-appear again, while the beds on the 

 northern out-crop die away gradually, both in size and richness, and dis- 

 appear on crossing the Vellaur river a mile and a half to the south-west of 

 Yaetapoor pagoda. Indications of magnetic iron beds are met with in 

 the great spur of the KalroyenmuUay, north of Yaetapoor, and are in all 

 probability representatives of this Singipooram series. In point of rich- 

 ness the beds of this series are not very remarkable, the richest being 



part of the northern or lowest bed lying south - 

 Walapaudy bed. 



south-east of Walapaudy bungalow. The thickness 



of the bed cannot be less than 50 feet, which may probably represent the 



general thickness of the three beds cropping out on the north side of 



the synclinal fold. To this series belongs in all probability a small 



bed of magnetic iron occurring on the flank of KalroyenmuUay, rather 



more than a mile south of Toombul. Of the possible relation subsisting 



between this series and the GodumuUay series, we shall speak fm'ther on. 



A^tli. Tlie Teertamulla.y'^ Group consists only of two great beds 



running parallel and close together along the crest 

 TeertamxQlay series. 



of the TeertamuUay ridge. They form also the 



peak of the TeertamuUay, which is a very fine and almost isolated 



mountain mass, about 8 miles north-east by east of Huroor. To the east 



the side of the magnetic iron bed forms a tremendous and apparently 



perpendicular precipice of many hundred feet in 



Cliflfs of iron ore- , . , . , , , i? i i -i 



height, which gives the peak a very fine bold 

 outline when seen from any position except from the east or west. This 



* Erroneously called the TecrleemuUay on the Atlas sheet. 



( 289 ) 



