168 



REV. THOMAS BROWN ON THE OLD RIVER TERRACES 



view of the first of these lines is seen in sketch 17, showing the form which 

 these deposits assume. The question as to how they were formed is one of the 



Sketch 16. — Karnes west of Dalvaich. 



most difficult in geology. That they are not due properly to the action of 

 flooded rivers is plain, for they may be traced up and out over the level face 

 of the coimtry, and are nowhere more fully developed than towards the water- 



Sketch 17. — Karnes west of DalvaicL 



shed between the basins of the Forth and Tay, where the action of streams 

 must have been feeblest. It would be natural to suppose that they were 



