AND OBSERVATIONS. 



121 



Here, it is observable, that the highest rocks ap- 

 pear to be composed of a felspar similar to that of 

 Ben Nevis. It passes, in some places, into a small 

 grained or compact syenite; and, at others, into 

 greenstone. All these overlie, or are subordinate 

 to, mica-slate, as the general rock ; which, in many 

 specimens, seems to contain much hornblende in a 

 state of intimate penetration. The mica even, in 

 some places, disappears entirely ; leaving only horn- 

 blende and quartz disposed alternately in thin lay- 

 ers. 



Spitall of Glenshee. — Half a mile south 

 of the inn, I discovered a bed of graphite, as- 

 sociated with gneiss, mica-slate, hornblende, chlo- 

 rite, &c. ; but I was unable to ascertain the sub- 

 stances in immediate contact. To the localities, 

 therefore, of this mineral already noticed, may now 

 be added the Spitall of Glenshee. 



The lower district, till we reach Blairgowrie, 

 gives the usual indications of primitive, transition, 

 floetz, and alluvial country. We find mica-slate, 

 with small garnets, and hornblende with pyrites ; 

 another species with veins of quartz ; also chlorite 

 and talc, near Cally. At the Bridge of Cally, 

 the rock is clay-slate, inclining to chlorite ; with 

 veins of a dark-coloured felspar, which is porphy- 

 ritic, and approaches to hornstone. 



From the particular localities which have now 

 been observed and specified, of granite in Scotland, 



