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XXXV. On the Geognosy of the Lothians, 



By Professor Jameson. 



(Read 17th December 1814. J 



Few districts in Scotland afford greater variety 

 of mineralogical phenomena than the Lothians } 

 and in none of them are the various transitions, 

 junctions and alternations, of the beds and strata, 

 and crossings of the veins, more distinctly and sa- 

 tisfactorily exhibited. In this beautiful tract of 

 country, the rocks are those of the transition, 

 flcetz, and alluvial classes, and of these the floetx 

 formations are the most interesting and important, 

 ^rom the numerous and unexpected relations which 

 they display, and the various useful minerals they 

 contain. Red sandstone occurs in such quantity, 

 as to form an important feature in the geognosy 

 of these counties, but the coal formation is that 

 which most powerfully excites our attention. 



I. — On the Red Sandstone and Coal Forma- 

 tion IN THE Middle District of Scotland. 



In order to render our description of the Lo- 

 thians satisfactory, it will be useful to premise a 



