ANNIVEESAET ADDEESS. 35 



by hydrate of iron." He comes to tlie conclusion tliat the 

 granite i-epresents one of what in Saxony and Bohemia are 

 called " stocks or stockworks, but of incomparably greater size 

 and thickness." 



He found beryl associated with quartz crystals, in a ferrugi- 

 nous clay in the spoil heaps of a shaft, and the same mineral on 

 tin crystals, in fragile small thin crystals ; rock crystal, holding 

 tin ore ; arsenical pyrites ; wolfram in the granite, disassociated 

 from tin. The wolfram itself is either pitch-black, brown, or 

 hyacinth-red in colour, forming occasionally in twins, as at 

 Schlaggenwald, with twelve-sided prisms and one pyramid. 



The drift is rich, and of recent granite detritus, from six inches 

 to twelve inches thick, spread over the range ; and there is an 

 older, probably Pliocene Tertiary cemented gravel of water-worn 

 pebbles and quartz (rock crystal and Cairngorm), hard granite 

 and hornstone, capping the top and dipping under basalt. The 

 granite detritus gave from 3 oz. to 2 lbs. of ore to 20 lbs. weight. 

 He says that for 150 miles far into Queensland all the creeks of 

 the granite country have proved to be stanniferous. 



At Glen Creek the granite simulates that at Beechworth, in a 

 small patch of 10 chains, in the creek which runs through hard 

 flinty, unfossiliferous slate. Small veins of arsenical and copper 

 pyrites are enclosed in the granite, which gradually passes into 

 slate ; the veins of the granite also intruding, without change or 

 interruption. 



This flinty metamorphic slate forms the base of the area, but 

 in it are outcroppings of micaceous granite, with large radiating 

 crystals of schorl ; and near these protrusions are veins of solid 

 tin ore traversing the slate. The granite is harder than at 

 Elsmore, and is occasionally traversed by an augitic greenstone 

 diabase, rougher at the surface than under a covering of drift or 

 alluvium, and passing occasionally into a variety of serpentine. 



Mr. TTlrich concludes with this remark : — " Positive want of 

 water, or too great an expense attached to the bi-inging of it to 

 the stanniferous locaKties will, however, I am afraid, be prohibitory 



