HOLLAND’S KLOFFE.
This pass is so situated that it forms the only communication from the country of the Hottentots to the country beyond the mountains. One hundred men could here successfully oppose the march of an immense army.
A defile sometimes forms the bed of a river, by which means the stream passes through a chain of mountains. In the United States there is an instance of this, where the opposite sides of the defile are connected together at the top by a natural bridge of rock.
NATURAL BRIDGE, VIRGINIA, U.S.
A Plateau is a plain of immense extent, which is formed of an extensive surface of elevated land. Some plateaus are eight thousand feet above the level of the sea. Lofty mountains often rise from these plateaus, many of which are volcanic.
Volcano is a word taken from the name which the Romans gave to the God of Fire. It now designates those mountains which are subject to eruptions of fire, smoke, stones, and lava. The irruption of a volcano is a most awful and majestic phenomenon. The earth is shaken, and rumbling noises are heard, which sound like thunder. Smoke and fire begin to issue from the top of the mountain.
Suddenly the fire becomes extinguished, and red-hot stones are thrown out; then the crater is filled with a burning liquid called lava, which looks like metal in a melted state. At last, the lava overflows the sides of the crater, and runs down the sides of the mountain, destroying every thing which lies in its path, and covering cities and cultivated fields with a sea of burning matter. Sometimes the lava is too heavy to be elevated to the summit, and bursts out from the side of the mountain.
CRATER OF MOUNT ETNA.