STEUART'S planter's GUIDE. 293 



bears a small proportion to the extent of the upper 

 carse ; from which may be inferred, either that the 

 sea has remained a shorter time at the present level, 

 or that some general cause has more recently opera- 

 ted to diminish the deposition, such as inferiority 

 of present climate not producing so much littoral 

 vegetation, — tides or higher v^inds preventing sub- 

 sidence by greater undulation or current, till the 

 diffused mud be carried out to sea *. The junction 

 of the higher and present sea-level carses, abrupt 

 and always definite, that is, not gradually declining 

 from the one to the other, would seem to indicate a 

 quick subsiding of the sea, or rising of the land, 

 such as has been known to result from subterraneous 

 derangement. The very accurate level of these carses 

 proves, that this portion of the world has remained 

 a very long time pretty free from these disturbances, 

 recently so prevalent in some other quarters ; and 

 if the change of sea-level has been owing to such 

 disturbance, it follows, from the extent and regula- 

 rity of the upheaving or subsidence, that the cause 

 must have been very deep seated, or of great magni- 

 tude. 



We begin to think, from our disposition to ram^ 

 ble from the Allanton system, that we tire of Sir 



* See Appendix F. 



