1. a volcano Cone (Steep cone). • Caused by lava with acids or Acid lava cone. • Inverted cone of a volcano, caused by the lava of acid. Because it contains the element silicon, namakkwa or other elements. • Thicker and lava flows. Thus, flow and move along slowly, but it is very steep, hillside. • This volcanic explosion severely. 2. volcano model shield (Shield Volcano). • Caused by lava flows that have a base (Basic lava volcano), because it contains iron and magnesium. • Lava fudge looks fast and slow. • There will be an explosion, not the ashes, smoke and small rocks and debris sprayed at the mouth of the crater. 3. the volcanic cone of gravel (Ash and cinder cone). Characterized as a narrow base, higher cone volcano that is the most serious bomb. 4. alternate layers (Composite cone). -A shape symmetry (Symmetry) -Cone of the volcano with many layers. Some layers consisting of lava and ashes alternately -If there is a severe blow to the lava flow coming out from the dot beside the Nice's hills. -A volcano that has a large crater and basin rim (Crater).
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