88 



IRONSTONES, 



135. — Ironstone, oolitic grains of hydrous oxide of iron 



Upper 

 Gallery. 



nTr .; — cemented by calcareous matter, forming the tipper beds nt 



wall-case 43. * itp • 1T ° rr J 



Coral Rag, and worked lor iron. — IS ear the Railway Sta- 

 tion, Westbary, Wilts. 



136. — Sandy clay ironstone, with an included pebble of 

 flint. — Hengistbury Head, Christchurch Bay, Hants. 



This ore forms layers of isolated reniform masses, of 

 considerable dimensions, in the Bracklesham beds of the 

 Middle Eocene, on the coast of Hampshire. As the coast 

 line has been worn back, the ironstone has been detached 

 from the cliffs and fallen on the shore, where it is found in 

 large quantities. It is also extracted from the cliffs (map 

 14), and furnishes an ore of iron which is not only valuable 

 from the ductility of the metal it yields, but also on account 

 of its tendency to promote the fusion of other ironstone. 



raised and sent to Newport, in South 

 Wales, to be smelted, in 1856. — H.W.B. 



137. — Clay ironstone, coated with peroxide of iron, from 

 Lower Green- Sand. — Bromham, Devizes, Wilts. 



138. — Peroxide of iron, with small included concretions 

 of clay ironstone, from Lower Green-sand. — Seend, near 

 Devizes, Wilts. 



There is much ironstone scattered through parts of the 

 Lower Green- Sand. Attention has been lately directed to 

 this deposit of ore, which is now being worked. 



139. — Clay ironstone, with rounded pebbles of flint. 



From London clay. — East Bloxioorth, Dorset. 



140. — Nodular concretions of clay ironstone, externally 



13,000 tons were 



coated with peroxide of iron. From London clay. — East 

 Bloxioorth, Dorset. 



141. — Iron sand, containing o5'6 per cent, of metallic 



Two miles east of Freshwater Gate, Isle of 



iron. 



Wight. 



This ore consists of grains of iron derived from the 

 destruction of cliffs of Lower Green-sand ; from these it is 

 washed by the sea, and afterwards deposited on the shore in 

 considerable quantities, between high and low water mark. 







i 



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70 



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