476 



APPENDIX. 



either that at some former period the waters of the Clyde and 

 Forth were considerably higher than they are at present, or that 

 the land has risen. 



2. Coal- Formation. Professor Jameson explained, that the 

 chief geological characters of the Old and the New Coal-for- 

 mations in Scotland had been made out by the Wernerian So- 

 ciety many years ago. He also noticed, that in 1811, in a me- 

 moir read before the Society, it was maintained that nearly the 

 whole, if not the whole, of the sandstone, both red and white, of 

 the island of Arran, belonged to the old coal-formation, and 

 that, upon this sandstone, on the opposite coast of the mainland, 

 as near to Saltcoats, the more common or newer beds of the 

 coal-formation were seen resting He also remarked, that, in 

 1805, in the " Mineralogical Account of Dumfriesshire," the oc- 

 currence of beds of red sandstone connected with the coal-for- 

 mation of that county is noticed ; also, that in the same publi- 

 cation, descriptions are given of the Roslin red sandstone, and of 

 other deposits of red sandstone, as members of the coal-field of 

 the Lothians ; and lastly, that this red sandstone occurred gene- 

 rally in the lowest part of the coal-formation. The red sand- 

 stone connected with quartz-rock, granite, &c. and older than the 

 red sandstone of the carboniferous system, Professor Jameson re- 

 marked, was well displayed on the banks of Loch Ness, in the 

 county of Sutherland, and in many other places in Scotland The 

 coaWormation at Brora in Sutherland was ascertained to be newer 

 than the great coal-formation, from its position, the characters of 

 the sandstones and slates, their organic remains, and the peculiar 

 nature of the coal ; and the same was said to be the case with 

 the coal of Skye, Canna, Mull, &c. The place of the coal of 

 Brora, in the Oolite system, was first fixed by Messrs Murchison 

 and Sedgwick. 



3. Syenite or Granitel of Skye, Craig of Ailsa, St Kilda, 

 Arran, fyc. — Professor Jameson requested the attention of geo- 

 logists who may visit Arran, to the syenite and granite rocks, 



