PHYSICAL FEATURES OF FUEGIA. 



427 



ments incessantly attacked by the waves, which strew the shores of the inlets with 

 their triturated fragments. Here the contrast between the Pacific and Atlantic 

 seaboards is complete. While the former is broken by innumerable inlets, with 

 endless channels, headlands and insular groups, the latter continues the regular 

 concave curvature of the Patagonian shore-line with scarcely a break all the way 

 from Magellan to Lemaire Strait. 



The clusters of islands separated from Fuegia proper by Beagle Channel — 

 Hoste, Navarin, the Wollaston archipelago and Cape Horn — belong entirely to 

 the Andean system. They represent the summits of plateaux and mountains, 



Fi". 163. — " Peteeboeough Cathedeal." 



whose base is deeply submerged in the waters of the Antarctic Ocean. The black 

 headland of Cape Horn rises some 500 feet above the surface of these storm-tossed 

 southern seas. 



The San Ambrosio and Juan Fernandez Groups. 



The oceanic lands politically dependent on Chili lie at far too great 

 distances to be regarded as geological dependencies of the South American 

 continent, from which they are separated by abysses some thousand fathoms deep. 

 San Ambrosio, the northernmost group, discovered by Juan Fernandez, and by 

 him called the Islas Desventuradas, " Strayed Islands," forms a rocky archipelago 



