1836,] 



JVeelgherries and Koondahs. 



259 



tersecting it nearly in an east and west direction ; and, on examination, 

 we see that it contains numerous veins of titaniferous iron ore. It is 

 the same place mentioned in a Note to this Memoir. 



The rounded oblong hill, on the sides of which the new road is con- 

 structed, and which is intersected by the vein of titaniferous iron ore 

 is formed of the granitic rock, which prevails in all the eastern range, 

 of Kaitee ; viz. an unstratified rock, composed of four minerals, in ge- 

 neral, hornblende, garnets, felspar and quartz ; occasionally, in some 

 masses a few plates of mica (No. 351. This rock, in this locality, as well 

 as in others of the same range, varies, not only in the proportions, but in 

 the number, of these minerals. This is another locality, which proves 

 the constant association of the titaniferous ore with rocks abounding 

 in hornblende.* 



The rock decomposes into the usual iithomargic earth, which, it would 

 seem, is the exclusive result of the decomposition of rocks containing 

 much hornblende (No. 36) j the presence, or absence, of the other mi- 

 nerals, making hardly any difference. With the exception of a few 

 yards above the road, where the vein of the titaniferous iron cuts the 

 rock, the whole surface of the hill shows no other rock than the above 

 mentioned granite. 



The vein of quartz appears to extend from the eastern to the western 

 nullahs ; and, although protruding in the eastern side of the hill, it 

 does not reach so high as the surface -of the convex summit of the hill. 

 I found in the western nullah some straggling pieces of the same ore. 



The breadth of this titaniferous vein is 250 ordinary paces, measured 

 in the cut of the road ; and, although evidently unstratified, yet, in 

 some of the masses, particularly those in which there are many veins 

 of the ore, it puts on an appearance of stratification. In general the 

 composition of the vein is this— the quartz is granular, and when 

 mixed with a great quantity of the ore, becomes friable, crumbly, 

 (No. 37) and full of little cavities, the greatest number of which are full 

 of an ochreous, or yellowish earth. But the same rock, in other parts 

 of the vein, assumes a great degree of hardness, although having the 

 same appearance as the friable one, but with less metal (No. 38). The 

 titaniferous iron is contained in thin ramifications through the quartz ; 

 in some places alternating in laminar plates of certain thickness with 

 it j in others in thin strata by itself. It is sometimes seen like a black, 

 shining varnish over the surface of the stones j but, chiefly, in 

 thin veins traversing the rock, not exceeding a few lines' thickness 

 (No. 39). Occasionally, between the metal and the quartz, in the seam, 

 there are little irregular cavities, the metallic side being lined some- 

 times with a most brilliant green, precisely the colour and brilliancy of 



* On doit faire remarquer que le titane sphere est tellement constant dans ce group 

 Vipuitique) qu' on le donne comme un caraet^re empirique a le faire reconnaitre, Tableau 

 ties terrains qui composent Vecorce du Globe, page 341. 



