174 



PHYSIOGRAPHY 



from the sea, and soon afterward a column of steam which rose 

 1,800 feet. A few days later there was a small island 12 feet high 

 where the disturbance had been, and in its center there was a crater, 

 from which eruptions were seen to be taking place. By the end 

 of the month the island was 50 to 90 feet high, and three-fourths 

 of a mile in circumference, and on August 4th it was 600 feet high, 

 and 3 miles in circumference. Activity soon ceased, and early in 

 1832 the island had been destroyed by the waves. This volcano 

 was short-lived, as was the island which it built. 



Volcanoes have recently built up islands off the coast of Alaska. 

 In 1795 such an island appeared about 40 miles west of Una- 

 laska. In 1872 this island was 850 feet above the sea, but had no 

 crater. In 1883 another island appeared close by, and was later 

 joined to the first. In 1884 it was 500 to 800 feet high. Another 

 volcanic cone was first seen in 1906, when it appeared as a great 

 steaming dome, and was named Parry Island. 



Some volcanic cones make mountains of great size. Such are 



Fig. 172. Mt. Hood, a snow-capped mountain. 



Mt. Rainier in Washington, Mt. Hood in Oregon (Fig. 172), Mt. 

 Shasta in California, Orizaba in Mexico, and many others. All of 



