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volcano (ppt)

Volcanic eruptions can cause various disasters, not only in the area near the eruption. Large eruptions can affect temperature because smoke and granulated sulfuric acid spewed by eruptions can block the sun and cool the bottom of the Earth's atmosphere. Type of volcano:
a. Stratovolcano
Composed of rocks the results of the eruption with the type of eruption change so that it can produce layers that are layered from several types of rocks
b. Perisai
the shape will be sloping slope, and the composition consists of basaltic rocks









c. Kerucut bara (Cinder cone)
Most of the mountain of this type to form a bowl on top
d. Caldera
formed from a very strong explosion which threw the tip of the mountain to form a basin
-active volcanoes in indonesia:

  1. krakatau(Lampung),sinabung(kab.karo), agung(bali)

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