Types of Eruptions
There are two types of eruptions: explosive eruptions and nonexplosive eruptions.
Explosive Eruptions - They are exactly what they sound like, they are eruptions that explode. They eject pyroclastic material (rock fragments) out of them at supersonic speed. Molten rock is blown into billions of pieces that harden when they are in the air. Explosive eruptions also have a high amount of silica and water. Explosive eruptions cause great damage very fast.
Nonexplosive Eruptions - They do not explode. They, however, send river-like lava flows down their sides. Nonexplosive eruptions also have a low amount of silica and water. Outpouring of lava can release a huge amount of molten rock. Some of the largest mountains on Earth have been created from these types of lava flows.
Explosive Eruptions - They are exactly what they sound like, they are eruptions that explode. They eject pyroclastic material (rock fragments) out of them at supersonic speed. Molten rock is blown into billions of pieces that harden when they are in the air. Explosive eruptions also have a high amount of silica and water. Explosive eruptions cause great damage very fast.
Nonexplosive Eruptions - They do not explode. They, however, send river-like lava flows down their sides. Nonexplosive eruptions also have a low amount of silica and water. Outpouring of lava can release a huge amount of molten rock. Some of the largest mountains on Earth have been created from these types of lava flows.
Classification of Volcanoes
Volcanoes are classified into three categories: active volcanoes, dormant volcanoes and extinct volcanoes.
Active Volcanoes - Volcanoes that have had at least one eruption during the past 10,000 years. Active volcanoes are likely to erupt again.
Dormant Volcanoes - Dormant volcanoes are like "Sleeping Giants". They have not erupted for a long time and most likely will not erupt for an extended period of time. However, it is still able to erupt again.
Extinct volcanoes - Volcanoes that cannot erupt again.
Active Volcanoes - Volcanoes that have had at least one eruption during the past 10,000 years. Active volcanoes are likely to erupt again.
Dormant Volcanoes - Dormant volcanoes are like "Sleeping Giants". They have not erupted for a long time and most likely will not erupt for an extended period of time. However, it is still able to erupt again.
Extinct volcanoes - Volcanoes that cannot erupt again.
Sources For This Website:
Holt Science & Technology "Inside The Restless Earth"
http://volcano.oregonstate.edu/fernandina
http://volcano.si.edu/volcano.cfm?vn=353010
http://www.volcanolive.com/fernandina.html
http://volcano.oregonstate.edu/cerro-negro
http://www.volcanodiscovery.com/cerro_negro.html
http://www.basicplanet.com/cinder-cone-volcano/
https://vianica.com/attraction/7/cerro-negro-volcano
Holt Science & Technology "Inside The Restless Earth"
http://volcano.oregonstate.edu/fernandina
http://volcano.si.edu/volcano.cfm?vn=353010
http://www.volcanolive.com/fernandina.html
http://volcano.oregonstate.edu/cerro-negro
http://www.volcanodiscovery.com/cerro_negro.html
http://www.basicplanet.com/cinder-cone-volcano/
https://vianica.com/attraction/7/cerro-negro-volcano