classification volcanoe

• classifications of volcanoes

  active, extinct, dormant
• erupting active, eruption within the last 10 000 years, explosive and quiet, rapid, low viscous, likely to erupt again

  active volcanoes
• not erupted within 10 000 years, but may erupt in the future


  dormant volcanoes
• not erupted within historic time, not expected to erupt in the future

  extinct volcanoes
• Are openings in Earth’s crust that allows the energy from the interior of Earth to escape the surface.

  The energy in the magma (composed of molten rocks from Earth’s mantle) that goes out are in the form of lava, ash, gas

  Volcanoes
• Is the study of volcanoes, its role is to gain an understanding of how volcanoes work, to further scientific knowledge, and to provide eruption hazard assessment, monitoring, and crisis management

  Volcanology
• are geologists who focus on the study of volcanic formation and activities.

  Volcanologists
• different types of volcanoes

  cinder cones

  shield cones

  composite volcanoes
• simplest type volcanoes

  formed lava particles emitted in vent

  one crater and rarely rise a thousand feet

  cinder cones
• • created because of continuous lava flows coming from vent
  • as these lava flows cool down, they produce a warrior shield like sloping flat cone


  shield cone
• • known as stratovolcanoes
  • ten steep sided and the cones are closely symmetrical
  • covered with layers of lava flows and ash rise up to 2500 meters
  • special feature is a conduit system of magma chamber


  composite volcanoes
• volcanic landform characterized by a conical shape formed by layers of volcanic material deposited during successive volcanic eruptions
• stratovolcanoes tend to slope gently at the base but rise quickly near the summit to form tall mountain peaks
• classification of volcanoes

  active volcanoes (erupting and dormant)

  extinct volcanoes
• has at least one eruption within the last 10 000 years

  classified into categories erupting and dromant


  active volcanoes
• an active volcano erupts, distinguished as either explosive or quiet

  erupting volcano
• happens because of a formation of gases under viscous flow of magma

  explosive eruption
• kind of eruption violent and rapid

  active volcano/ erupting
• ejects volcanic materials, lava flows, and ash unto a large area

  active/erupting volcanpo
• classified only when it emits low viscous lava gases can easily escape

  quiet eruption
• a volcano it it has not erupted within the last 10 000 years

  • not certain when this find of volcano will erupt, but is expected to occur in the future

  dormant volcano
• mt st. hekens, mauna kea island in big hawaii


  dormant
• this kind of volcano has not had an eruption within historic times and is not expected to erupt again in a comparable time scale of the future

  extinct volcano
• kohala in big island hawaii

  extinct
• inside volcano


  magma
• outside volcano


  lava