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• Volcano


  Natural opening in the earth's surface where molten rocks, smoke, gases and ashes are ejected
• Crater


  Funnel-shaped depression at the top of a volcano formed as a result of explosive eruption
• Caldera


  Volcanic crater formed when part of the wall of the crater collapses following an explosive eruption
• Volcano


  Natural opening in the earth's surface where molten rocks, smoke, gases and ashes are ejected
• Magma


  Molten rock inside the earth
• Crater


  Funnel-shaped depression at the top of a volcano formed as a result of explosive eruption
• Caldera


  Volcanic crater that is formed when part of the wall of the crater collapses following an explosive eruption
• Lava


  Magma that has been ejected out of a volcano
• Magma


  Molten rock inside the earth
• Shield Volcano


  • Formed by the accumulation of lava oozing out from the volcano
  • Broad, slightly domed structure
• Shield Volcano


  • Mauna Loa in Hawaii
• Lava


  Magma that has been ejected out of a volcano
• Cinder Cone Volcano


  • Built from ejected lava fragments
  • Steep slope and wide crater
  • Most abundant of the three major volcano types
• Different types of volcano

  • Shield volcano
  • Cinder cone volcano
  • Composite volcano
• Cinder Cone Volcano


  • Paricutin in Mexico
• Shield volcano


  • Broad, slightly domed structure
  • Formed by the accumulation of lava oozing out from the volcano
• Composite Volcano


  • Also known as a stratovolcano
  • Large, nearly perfect sloping structure formed from the alternate solidification of both lava and pyroclastic deposits
• Shield volcano


  • Mauna Loa in Hawaii
• Composite Volcano


  • Mayon Volcano
• Cinder cone volcano


  • Steep slope and wide crater
  • Most abundant of the three major volcano types
• Phreatic eruption


  Steam-driven eruption as hot rocks come in contact with water, also called a hydrothermal volcano
• Cinder cone volcano


  • Paricutin in Mexico
• Phreato-magmatic eruption


  Violent eruption due to the contact between water and magma
• Composite volcano


  • Large, nearly perfect sloping structure formed from the alternate solidification of both lava and pyroclastic deposits
• Strombolian eruption


  Periodic weak to violent eruption that reaches up to 20km high with pyroclastic flow and ash flow tephra
• Composite volcano


  • Mayon Volcano
• Types of volcanic eruption

  • Phreatic
  • Phreato-magmatic
  • Strombolian
  • Plinian
  • Vulcanian
• Plinian eruption


  Excessively explosive type of eruption of gas and pyroclastic material
• Phreatic eruption


  Steam-driven eruption as hot rocks come in contact with water
• Vulcanian eruption


  Type of volcanic eruption
• Phreato-magmatic eruption


  Violent eruption due to the contact between water and magma
• Types of volcanoes


  • Shield volcano
  • Cinder cone volcano
  • Composite volcano
• Types of volcanic eruptions

  • Phreatic
  • Phreato-magmatic
  • Strombolian
  • Plinian
  • Vulcanian
• Strombolian eruption


  Periodic weak to violent eruption that reaches up to 20km high with pyroclastic flow and ash flow tephra
• Active volcano


  Volcano that has had at least one record of eruption during the past 10,000 years
• Plinian eruption


  Excessively explosive type of eruption of gas and pyroclastic material
• Dormant volcano


  Active volcano that is not erupting but is supposed to erupt again
• Classification of volcanoes


  • Active
  • Dormant
  • Inactive
• Dormant volcanoes in the Philippines

  • Mount Isarug, Camarines Sur
  • Mount Iriga, Camarines Sur
  • Mount Mayon, Albay
  • Mount Bulusan, Sorsogon
  • Mount Canluan, Negros Occidental
• Inactive volcano


  Volcano that could erupt but has not erupted for more than 10,000 years, also called extinct or sleeping