DESCRIPTION OF TINTO. IS8 



In concluding the delineation of Tinto and its 

 neighbourhood, I may remark, that the relative 

 disposition of the several rocks composing its mass, 

 corresponds with sufficient exactness to the geo- 

 gnostic description of a floetz mountain. The 

 conglomerate every where occupies the lowest 

 place, and is covered, in a manner perfectly con- 

 formable to the most natural idea of deposition, 

 with greenstone, claystone, and felspar, all evi- 

 dently of floetz formation, and assuming a finer 

 and more crystalline texture as we ascend. 



This occurrence of claystone and felspar, in a 

 position corresponding to what is found in the 

 Eildon Hills, the Pentlands, the Ochils, Papa 

 Stour, around Dundee, and in other places, ap- 

 pears to favour the hypothesis of a particular 

 overlying floetz formation, in which these sub- 

 stajices are prevailing ingredients, extending over 

 a considerable portion of the lower country of 

 Scotland. I am informed, that the districts ad- 

 joining to Hall6 in Westphalia, are of a similar 

 structure and description. The conglomerate of 

 the Grampians, seems to have been formed from 

 the debris of older rocks. 



It is also worthy of observation, that the cha- 

 racters and relative position of the conglomerate 

 on which Tinto rests, considered in its connection 

 already described, with grey-wacke on the one 

 hand, and the older sandstone on the other, seem 

 to furnish an illustration of a very important fact i 



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