366 MINERALOGY OF THE REDHEAD. 



to explain the appearances exhibited by the 

 others. 



There are no Veins of any consequence travers- 

 ing the strata of this.district. Veins of calcareous- 

 spar and heavy- spar do occur, but present no cir- 

 cumstances in their history deserving of particular 

 notice. 



The rocks of the Redhead, appear to belong to 

 the old red sandstone formation of Werner. This 

 formation stretches across the island from the 

 western to the eastern sea, and flanks on both sides 

 the Grampian Mountains. On the south bank of 

 the Murray Frith, it commences near Speymouth, 

 and stretches tow^ards Nairn, and includes valu- 

 able beds of limestone, as at the Bridge of Find- 

 horn and Inverugie near DufFus. The limestone, 

 at the latter place, contains a considerable quan- 

 tity of lead-glance, and irregular masses of flint 

 and calcedony. On the eastern coast, it com- 

 mences near Stonehaven in Kincardineshire, and 

 extends to the River Eden in Fifeshire. The 

 southern boundary extends westward by Cupar, 

 the north side of the Lomond Hills by Kinross, 

 Alva and Kippen, towards Dunbarton. In the 

 red sandstone of this district, are included many 

 subordinate beds of porphyry, greenstone, clay- 

 stone, clinkstone, compact felspar, amygdaloid, 

 trap-tuff, slate-clay, and limestone. The rocks 



