COAST LINE — LOS ANGELES TO SAN FKANCISCO. 131 



Franciscan rocks and dune sand. On and between these "hilk is the 

 citv of San Francisco. 



South San Francisco is a manufacturing town, whose chief industry 

 is the refrigeration and preparation of meats. Here also there are 



steel, glazing and terra-cotta, brick, paint, pipe, 



South San Francisco. ^^^ ^^^ ^^^^.j^g^ 



Elevation 11 feet. The five tunucls between South San Francisco 



Los Angeles 461 miles. i n n-i • ^ p • 



and San rrancisco are irom i,0S8 to 3,547 teet in 

 length. All are in rocks of the Franciscan group. The first, through 

 Sierra Point, is in sandstone, of which there is a fine exposure in an 

 open cut beyond the tunnel. The second, the longest tunnel, pene- 

 trates a complex ridge of sandstone, radiolarian chert, and diabase. 

 The large railroad traffic near San Francisco is indicated hy the great 

 freight yards in Visitation Valley, between the second and third 

 tunnels. As the train emerges from the third tunnel, which is in 

 sandstone, Hunter Point appears ahead. Beyond Hunter Point, on 

 the left (west), across the salt marsh of Islais (ees-lah'ees) Creek, is 

 the city garbage incinerator. The last two tunnels are in serpentine. 

 Near the new terminal station a sugar refinery and the Union Iron 

 Works, Avhere the famous battleship Oregon and many other warships 

 have been built^ arc to be seen on the right. 



A short description of San Francisco is given on pages 86-87, 



