OUTLINES OF GEOLOGY. 



15 



31. Of the gaps or passes which are traversed by roads, 

 the following are the most remarkable :-— 



r»iil 1 nnnnoYii 



OllUllUliqUcllll 



( \,C\Tc\\\ 1 (*Y2\ C! 1 



l VjUl UiiiCi do 1 



1 5 226 feet 



iraquani 



( Tin \ 





(t1 miliar 



I Do ) 



14,075 



Tolapalca 



( Do. ) 



13,672 



Mount Cervin 



(Alps) 



10,167 



Port d' Oo 



(Pyrenees) 



9843 



Estanbe 



( Do- ) 



8402 



Furka 



(Alps) 



8300 



Great St. Bernard 



(Do.) 



8270 



St. Gothard 



(DoJ 



7192 



32. The highest inhabited part of the globe, as far as 

 has been ascertained, is at Aneomarca, in the Cordilleras. 



The highest part of the city of Potosi 15,722 feet 

 Quito 9541 

 La Plata ("Bolivia) 9331 



Santa Fe de Bogota 8731 

 Arequipa 7800 

 Mexico 7471 

 St, Veran (Alps) 6693 



Heas (Pyrenees) 4807 



33. The limit of perpetual congelation is as follows :■ — ■ 



Equator - - - - 15,800 feet 

 20° 15,200 

 45° .... 9350 

 65° .... 4900 



