Why The Volcano Is Only Found In A Few Places? Near the City of New York, London or Paris, there is not the slightest volcano, also will not be possible there are volcanoes around the cities in the coming times. but there are certain parts of this on our Earth where there are many volcanoes, even lying to each other.
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the central part of the American Continent bordering the Pacific Ocean, this region is one of the most active volcanoes in the world. indeed essentially over two thirds of the number of active volcanoes, and a large number of volcanoes that not long ago dead activities, are in the surrounding border Pacific Ocean this reason, or have certain places that are padded on the layer of crust compared to other parts of the Earth's crust in other places, because in the absence of a layer of the Earth's crust that is tender, a volcano impossible could form.
How Volcano That Formed
as you know, the central part of our Earth's belly is hot, the deeper you descend from the Earth's surface towards the Earth, high temperatures are increasing, at a depth of 20 miles that temperature so heat (1.000 to 1.100 degrees) so that the stones ever will be dissolved easily.
when the rocks were mild, so it will expand and require a large space, in certain areas on the surface of the Earth has a new mountain ranges formed not long ago (not long ago here in thousands of years lately). under and around a mountain range that there is this new pressure less than in any place on the Earth, it is "soft" on the Earth's crust are solid and intact it is.
Please Read Types Of Mountain And How are Mountains Formed
so the rocks are melted in the belly of the Earth, which we call "magma" was looking for a way out via part of this software, then it is making a particular room as new shelters for rocks that have been melting it, materials churned from the belly of the Earth it penetrate out through the cracks that being at the time of his strength pushed him out.
when the pressure on the pound the rocks that melted material is becoming increasingly large, even larger than the durability against the roof of the ground in the up, then his death it becomes a ground layer of volcanic eruption, it would all ingredients until sustained gas contained inside the new shelter was running out.
the materials spewed out by the volcano eruption was composed mostly of gas and substantial number of the rock that have been melting is, generally we call with "lava". also solid particles, which it looks like coals of fire or dust spewed out, heat to the outside, a volcanic eruption is actually a gas explosion, but most of the lava was so smooth to resemble a sort of the ash powder so that in the event of volcanic eruption looked like black smoke rolling soared into space.
