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Frampton Cotterell to Michaelwood Chase, — and their mineral 

 contents; especially the ores of Iron, the mode of their occurence, 

 and the date of their filling-in. Mr. Ethekidge noticed and 

 described the chief faults which traversed the country from 

 north to south, viz., the May Hill, Ram Hill, Rangeworthy, and 

 Frampton Cotterell faults ; which he believed terminated in the 

 lake near Tortworth Court. In these " faiilts " are situated the 

 rich ores of brown hsematitic Iron, or the brovm hydrous per- 

 oxides, which are so well known in other parts of the county. 

 The main deposit at Frampton Cotterell, and the workings upon 

 it, were described, and the course of the lode and fault traced 

 through the apex of the Coal-basin and through the Limestones, 

 &c., to Tortworth ; so also the two other parallel and iron- 

 bearing faults (lodes) ; the Iron in them being determined by its 

 presence along the depressed ground, and by the dislocation of 

 the country. The chief feature, however, in Mr. Etheeidge's 

 paper was the age and mode of filling-in or accumulation of the 

 Iron ores in these " faults " and " veins," which he beheved 

 mainly to have taken place during the denudation of the Bristol 

 Coal-basin by the seas that deposited the New Red Sandstone, 

 and again were much influenced and modified upon the removal 

 of the mesozoic rocks afterwards down to their present condition, 

 and the re-exposure of the palaeozoic land-area again. 



Mr. Ethekidge bases his views upon the existence of the 

 " faults " and " fissures," which were present during the 

 palaeozoic epoch, after their disturbed and folded conditions ; 

 their subsequent filling in under the agencies of denudation, and 

 the deposition of new material ; the oxidation of these materials 

 upon exposure ; and chemical action under various conditions. 



Mr. Ethekidge also endeavoured to shew the relation the 

 Dolomitic Conglomerate holds to the lodes ; especially as deter- 

 mined upon the higher levels of the Carboniferous, Limestone, 

 Millstone Grit, &c., everywhere surrounding the basin. The 

 chief rock, however, in which the Ironstones run and are now 

 deposited is the Pennant, in which it is that the mining 

 operations at Frampton are carried on. This great Micaceous 

 Sandstone zone divides the upper from the lower Coal-measures 



