172 THE MINERALS OF NEW SOUTH WALES. 



LlMONITE. 



A variety of brown haematite. Large stalactites are formed by 

 the ferruginous springs at Berrima, Nattai, and elsewhere, and the 

 deposits of brown iron from these often contain beautiful impressions 

 of leaves and other objects ; also in botryoidal and mammillated 

 forms. 



Extensive deposits of what are termed Clay Band iron ores occur 

 interbedded with the coal measures. These form an earthy variety 

 of brown haematite ; yet they are often very rich, and as they 

 occur in immense quantities in close association with coal, they 

 form a most valuable source of iron. 



A specimen from Wallerawang yielded the following results : — 



Water, hygroscopic 1*28 



„ combined 3*54 



Silica and insoluble matter. . . 4-60 



Sesquioxide of iron 80*00 — 56 per cent, metallic iron. 



Phosphorus *49 



Sulphur 'II 



Undetermined constituents.. 9*98 



100-00 



Specimens from two other seams in the same locality yielded 

 49*28 and 53*31 per cent, of metallic iron respectively. 



Similar clay bands occur at Jamberoo ; in the Buttar Ranges, 

 near to East Maitland ; at Mount Wingen, and elsewhere. 



Pisolitic Iron Ore — Is another of the less pure forms of Haematite. 



Large superficial deposits of pisolitic and brecciated iron ore, 

 red and brown, occur near Bungonia and Windellama Creek, and 

 overlie the slate more or less continuously between Bungonia, 

 Jacqua Creek (with limestone), Dog Trap, and Spring Creeks, 

 forming what are known as the " Made Hills." 



The " Made Hills" which lie between the Macintyre River and 

 Cope's Creek are composed of the same material. 



A pea-iron ore occurs in the coal at Nattai, and near Bungonia 

 there is an auriferous argillaceous iron ore. At the Boro Creek, 

 County of Argyle, there is a botryoidal pisolitic ore. 



The same variety occurs at Brisbane "Water. 



Med and Yellow Ochres — Are closely allied to the above Haema- 

 tite iron ores, and are usually found associated with them. 



Spathic Iron Ore. — Chalybite. 



Siderite, Sphoerosiderite. — Hexagonal system, rhombohedral 

 forms. 



Chem. Comp : Iron carbonate = FeCO. Iron oxide, 62*1 ; 

 Carbonic acid, 37*9. 



