EFFECTS OF VOLCANIC ERUPTIONS ON THE EARTH
volcanic hazards to the earth * geological changes to the earth * hazard links VOLCANIC HAZARDS TO THE EARTH
Volcanic eruptions have a lasting effect on our Earth. When pyroclastic material is blasted up into the air, there is not only the effect of various sized rocks and ash falling back to the earth, but also the lasting effects of finer ash and dust spreading around the earth. But it isn't only pyroclastic material that leaves its imprint on the earth: lava and missing earth change things as well.
These are some of the more violent effects or hazards volcanoes pose to the earth. There are some other causes for worry as well. See the links below for more information about acid rain, ash problems for humans and aircraft, and other hazards. GEOLOGICAL CHANGES TO THE EARTHCraters and Calderas
When a volcano explodes, much of the rocks and debris are blown from the top of the volcano. This is called a crater. If a great deal is blown off and the magma chamber below the volcano empties itself of all its magma, then the top of the volcano caves in on itself and the earth all around the volcano sinks. This is how calderas are created.
LAVA PLATEAU
"Steamboat Rock," a lava plateau on the Columbia River, WashingtonA lava plateau is a geological landform that is created when large amounts of runny lava leak from large cracks in the earth called fissures. The lava may run and spread evenly over large areas of land to create a unique look. Two examples of lava plateaus in the United States are Lassen National Park in California, and the Columbia River Plateau in Washington.
Lava plateaus at Lassen Volcanic National Park in CaliforniaColumbia River Flood Basalt Province, Idaho, Washington, Oregon, USAHAZARD LINKS |
