Introduction to volcanoes
The earth's mountains, plains, plateaus, soils, rocks, etc. as we see it today is believed to have gone through many phases, with about 80% of it being carved out by the action of volcanoes.
A volcano is simply a rapture (opening or vent) on the earth's surface (crust) through which molten magma (extremely hot mixture of gases, lava, ash and other burning substances) escape on to the earth's surface.
How do Volcanoes look like?
A volcano looks like a mountain, although they are two different things.A mountain is a large natural rise of the earth's surface, more like a giant heap of sand. A volcano is also like a big heap of earth just that this heap is a mixture of lava, ash, dust, and other substances that have piled up over many years. It pours out of an opening in the earth after an eruption. This means volcanic eruptions or explosions can create elevations that we can call mountains.
In May 1980, the Mountain St. Helens, in Washington USA , in May 1980, erupted or exploded and it was an awesome natural occurrence because it destroyed some parts of the landscape around it but at the same time it was a beautiful sight.
Volcanoes occur at weak zones or points in the earth’s crust (including constructive and destructive boundaries). They do not occur at conservative boundaries. (Bolded words explained here)
For history lovers…
In A.D. 79 (really long ago) two Roman cities, Pompeii and Herculaneum, were completely buried in ash and dust in a matter of hours after a volcanic eruption. Their remains were not uncovered until modern archaeology made that discovery 1700 years after. (you can do your own research into this event)
The word, ‘volcano’ was made out of the name of a Roman god of a small island in the Mediterranean sea of Sicily called ‘Volcan’.
Did you know?
The biggest volcano in the world is Mauna Loa in Hawaii. Its whole volume is about 80,000 cubic kilometres.
Now we shall see in a bit more detail how volcanoes come about. Click next.