276 Dr. Mac Culloch's Supplementary Observations, £sV. 



the shore which lies to the eastward of Ord, as particularly inter- 

 esting in this view ; since, if it does not present examples of an 

 exact and satisfactory transition between the two rocks, it affords 

 very instructive views of the change which, under particular cir- 

 cumstances, occurs in the sandstones, from the distinctly granular 

 and arenaceous to the compact and quartzose state. 



