Chap. IV. 1.] metamorpiiic rocks. 53 



very pale and delicate greenish-blue tint. It contains here and there 

 small masses of garnet and quartz, with prismatic ciystals of a dark green 

 mineral (Actynolite ?), varying in size from about one inch and three 

 quarters long by one-third of an inch broad downwards. The smaller 

 green crystals are very numerous in patches, chiefly at the sides of the 

 bed. Isolated dodecahedrons of garnet are also to be found, and also im- 

 perfect tabular crystals of white and pink Calcite, and small masses of 

 Chlorite.^ Scattered over the ground near the beds of limestone, there was 

 much debris derived from it and from some of the adjoining granite 

 veins ; and among this debris several very fine pieces of compact garnet 

 rock, and some specimens of quartz, containing large but imperfect ciys- 

 tals of black and green hornblende. 



A little more than 2 miles to the north-west of these limestones 

 Elanoothoomungalum ^^ Culputty, another small bed is exposed close to 

 ^® ■ the south side of the road, and only a few hundred 



yards to the west of the village of Elanoothoomungalum. About 50 

 yards in length of this bed are uncovered. It shows faint foKation head- 

 ing to east-south-east, with a distinct dip of 85° to N. N. E. The bed 

 is about a yard thick, and consists of very pure pale greenish-grey sac- 

 charoid limestone, without any associated minerals. It is impossible to 

 say whether there be any connection between this apparently isolated 

 bed and those at or near Culputty, the whole country being much covered 

 up oy debris and by soils, especially near to Elanoothoomungalum. 



North of the river Cauvery, beds of crystalline limestone occur in 



Beds north of the several places, namely, at Shatumboor, near Nam- 



Cauvery. ^^^ ^^^ ^^ Mootum, west of the lyaur river ; near 



* A few feet from the northern end of the limestone beds lay some loose blocks of a 

 very dark impure limestone, throughoiit which are distributed many of the dark green crys- 

 tals. In a fragment of this dark purplish-grey rock, a speck of a metallic mineral, 

 apparently Copper-pyrites, was found, but no further traces of any metal were observed. 



( ^^75 ) 



