of Serpentine, Si^c. in the Apennines. 205 



EXPLANATION OF PLATES V & VL 



Plate V. Fig. 1 and 2. 



Natural section of the two sides of the valley of Cra- 

 vignola, Dear Rochetta, 15 kilometres [above 11 miles] 

 to the N. of Borghetto, to the north of the gulf of Spezia. 



Fig. 1. Right bank of the torrent. 



Fig. 2. Left bank of the torrent, or base of Montenero, 

 an escarpment opposite that of the right bank. 



A. Green diallage serpentine. 



B. Diallage rocks. 



a. Serpentine diallage rock. 



b. Calcariferous reddish diallage rock. 



C. Reddish jasper mixed with greenish zones. 



D. Smoke grey fine compact limestone, with spathose 

 limestone veins. 



E. Greyish marly schist. 



Fig. 3. Section of a part of Monte Ferrato, near Prato 

 di Sesto, to the N.W. of Florence. 



A. Diallage serpentine. 



B. Diallage serpentine passing into altered diallage 

 rock. 



C. Reddish and yellowish jasper. 



D. Smoke grey compact fine limestone, in scattered 

 blocks. 



Fig. 4. Figure shewing the escarpment which is seen 

 to the W. of the road after Pietramala, going from Bolog- 

 na to Florence, between Maschere and Covigliano. 



A. Hornblende serpentine. 



B. Hornblende diallage rock and amygdaloidal dial- 

 lage rock (euphotide variolitique). 



C. Reddish jasper mixed with greenish zones. 



D. Smoke grey fine compact limestone, with spathose 

 veins. 



E. Hard compact sandstone, and schistose sandstone. 



