470 DOMAIN V. CALCAREOUS. 



other sites. This micaceous lime-slate was afterwards ob- 

 served by our Excellent author at the little St. 

 Bernard ; and at the Roth-Horn and Mont Cer- 

 vin, two mountains near the celebrated Rosa, 

 chiefly composed of serpentine. 



The subsequent detached observations lilay 

 also be added from the same treasure of oro- 

 logical knowledge. 



Near Morges the mountains are all calcareous* 

 with undulated veins mixed with mica, forming 

 a firie cipolino. The roofs of the houses are co- 

 vered with thin plates of the same stone. 



A bed of primitive lime-slate, between beds of 

 gneiss. It is six feet in thickness; and the 

 layers, of about half an inch, are tinged by 

 some infiltrated green matter. 



A lime-slate, analysed, which is incumbent on 

 granite. 



Roche Michel, near Mont Cenis, is composed 

 of a mixture of calcareous mica slate and green- 

 ish talc, the latter being predominant*. 



Aspect 1. Micaceous lime-slate . From Mont 

 Cenis. From M. Cervin, and other parts of the 

 Alps. 



The same, from Canada, North America. 



A micaceous lime-slate, the limestone being 



* Sauss. Q50, 2225, 8?2, 1262. 



