A GOLDEN GATE FOR FRISCO
The famous Golden Gate of San Francisco (so called because of the golden sunsets shining through), and its splendid harbor, made by the sinking of the land. The gate was originally cut by the waters of those two rivers that join and flow into the bay. What rivers are they?
HOW THE SEA HELPS MAKE GOOD FARMS AND BIG CITIES
Moreover the rivers, in the very act of wearing down the land and with it filling up the sea, help keep the land from being flooded, as it would be if something were not done. For, as we learned in the story of why the mountains border the sea the sediment poured in by the rivers helps raise the mountains and the land along the sea border. It is during the downward movement of the continental margins that most sediment is spread from the inpouring rivers because the dip of the land is greater and the swifter current not only cuts down the land faster, but carries the sediment farther out from shore. Here the new rock is made from old worn-out soil, and, since these new rocks when brought to the surface will in time decay, fresh soil is thus prepared for future generations. More immediate benefits of this sinking of shores and advance of waters are the harbors which have made great cities like New York and London, on or near the seacoast. These harbors are all the results of "transgressions," combined with the digging action of wave and tide.
Copyright by Underwood & Underwood
STONE TERRACES FOR THE GANNETS
This picture shows what the rising of the land and the architectural engineering of the sea did for the gannets on the coast of Canada.
TAKING A HINT FROM THE SEA'S SHORE ENGINEERING