190 MOUNTAINS OF JURA. 



tion limestone, and contain, although rarely, testaceous 

 petrifactions. 



NOTE C. 7. p. 42. 



Crystallized Marbles resting on shelly Strata. 

 M. Cuvier says, " the crystallized marbles never cover 

 the shelly strata." This observation is not perfectly 

 correct ; for transition limestone, and certain magnesian 

 floetz limestones, which are to be considered as crystal- 

 lized marbles, contain testaceous petrifactions, and alter- 

 nate with other strata that contain petrified shells. 



Crystallized marble, or granular foliated limestone, 

 occur, along with floetz trap rocks, in the coal formation, 

 in different parts of Scotland, as upon the Lomonds, in 

 Fifeshire, &c. 



NOTE D. 7. p. 43. 



Rolled Masses upon the Mountains of Jura. 

 Numerous large blocks, or masses of mountain rocks, 

 are met with in almost every country of Europe, and 

 frequently very far removed from their original situa- 

 tions. Switzerland and the surrounding countries pre- 

 sent numerous and very interesting appearances of this 

 kind. On the mountains of Jura, immediately in the line 

 of direction of the Vallais, and nearly to the height of 

 6000 feet, enormous blocks of granite are found resting 

 upon the limestone rocks of that range of mountains. 

 These blocks are of that species of granite which forms 

 the mountain of Ornex, belonging to the group of Mont 

 Blanc ; hence it is inferred that they must have been 

 transported by the force of water from that region to 

 their present situation. 



