286 ON THE PARTICULAR ORDER OF 



Gneiss Limestone 



Micaceous Schist Chlorite Schist 



Argillaceous Schist Argillaceous Schist. 



Chlorite Schist 

 Argillaceous Schist 



It being unnecessary to quote more of these, 1 

 shall give some local examples of an order which may 

 be called inverted; supposing the direct one to be 

 the succession of gneiss, micaceous schist, quartz 

 rock, limestone, and argillaceous schist, as formerly pre- 

 sumed, and omitting the other members of this class. 



Granite is succeeded, first by argillaceous schist and 

 then by gneiss, in lona and in Bamffshire; and, in 

 Rossshire and Sutherland, after the gneiss, there fol- 

 lows another argillaceous schist. In Sutherland, in 

 another place, after granite, there come in order, 

 gneiss, quartz rock, bituminous limestone, quartz rock, 

 and gneiss. Numerous other instances of the same na- 

 ture might be adduced, but it would be superfluous. 



A few examples of short series, will tend, even 

 more than the former irregular ones, to show the 

 want of a fixed order among the primary strata; and 

 that they were alluded to in the first part of this chap- 

 ter, needs not prevent a tabular view of them here, as 

 it will render these illustrations more useful. Their 

 leading character consists in the omission of most of 

 the primary strata, and, in some instances, of some of 

 the secondary ones also; so that they might equally 

 have been enumerated in the next division of this sub- 

 ject, where it will indeed be necessary to refer to 

 them. Most of the primary strata are wanting in the 

 examples which immediately follow. 

 Granite Granite Granite 



Gneiss Micaceous Schist Argillaceous Schist 



Secondary Strata Secondary Strata Secondary Strata 



In Caithness and Su- In Arran. In Arran, Cornwall, 



therland. Abcrdeenshirt &c. 



