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английский) 2:
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Form volcano strongly depends on the viscosity of the lava. Volcanoes formed inviscid lava have gentle slopes. Such volcanoes are called thyroid. The thick lava can not leak away from vents and usually forms a volcano in the form of a cone - conical. .Predskazat Volcanic eruption is very difficult, because every time this happens in different ways. In the old days, for example, is determined according to various criteria, such as the emergence of new bumps on the slopes today vulkana.V volcanic eruption can be determined by a restless animal behavior before the eruption. For example, fish.
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