The Volcanoes


The active volcano occurs when molten rock (magma) reaches the land surface by a vent or crack in the insolence. The volcanic activity can affect the prominence of lava on the surface of the earth and the forcing out of ash and solid rock and the release of water vapor or sulfur dioxide or carbon dioxide (gas).

The Volcano

The volcanoes generally happen near plate edges where the gesture of the plates has produced cracks in the lithosphere by which the magma can run. Around 80 % of volcanoes happen at focused plate edges where sub ducted material rises and melts by cracks in the crust of earth. The Cascade Range was formed in this method. The volcanoes can be classified according to the kind and form of their ejected system. The fundamental types are: - the composite volcanoes, the shield volcanoes, the cinder cones and the lava attics.


    

The composite volcanoes are steep rooted, the symmetrical cones made of multiple levels of viscous ash and lava. Many composite volcanoes have a volcanic crater at the summit which contains the middle outlet. The lavas flow from breaks in the volcanic crater surround or by cracks on the wings of the conoid.


Types of volcanoes

The shield volcano

The shield volcanoes are built almost wholly of extremely fluid (low viciousness) lava runs and they form slowly from several flows that spread out over a broad region from a central outlet. The consequent structure is a wide, softly sloping cone with a visibility like a warrior's screen.

The cinder volcano

The cinder cones are the easiest kind of volcano (vent). The cinder cone forms once the lava blown violently into the region separates into small breaks up those solidify and fall as clinkers. The steep sided cone figure is formed just about the volcano with a volcanic crater at the height. The sunset volcanic crater in Arizona is a clinker cone that made less than 1000 yrs past cutting off the lives of the domestic inhabitants of the area.

The lava volcano

The lava domes are made once extremely viscous lava is squeezed out from a volcano and forms a circled, steep sided attic and lava collects around and on the volcano rather than flowing off, generally growing by enlargement from inside. The lava domes generally occur within the volcanic crater or on the flanks of composite vents.






Next Chapters

Conservation of Energy
Oxygen
Organism, Bacteria and Virus
Atom
Energy & its Types
The Volcanoes
Rock Cycle
Minerals
Food Resources
Water
Population
Renewable Sources of Energy
Pollution
Irrigation and Types of Irrigation
Population Growth
Non-renewable Sources of Energy
Ozone Depletion
Soil Erosion
   

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