~ Volcanoes: Part I ~
~ Introduction ~
(( Active - Dormant - Extinct ))
Global Volcanism Program / Volcano Under the City
Top Ten List-Worst Volcanoes in History / Volcano Fun Facts
Discovery Channel Super Volcano / USGS Volcano / NOVA Volcano
Virtual Build-a-Volcano / The Volcano Maker / Volcano Videos / Volcano Hazards
(Did you know: There are approximately 550 active volcanoes on Earth today.)
~ Volcano Terminology ~
Active: A volcano that will likely erupt again in the future.
Dormant: A "sleeping" volcano that may erupt again.
Extinct: A volcano that will never erupt again.
>> Magma Chamber, Crater, Vent, Cone, Bomb, Pyroclastic Flow, Ash Cloud <<
>> Acid Rain, Cinders, Lahar, Landslide, Sill, Dike, Dome, Tephra, Lava Flow <<
~ The Pacific Ring of Fire ~
The Pacific Ring of Fire:
The oceanic crust of the Pacific Plate subducts underneath surrounding continental plates, causing a circular ring of earthquakes and volcanoes around its border.
FYI: Over 75% of all volcanoes are located on the Pacific "Ring of Fire"
Click here: Ring of Fire Song by Johnny Cash
Subduction Zone Volcanoes:
Subduction is the process by which an oceanic plate is pushed down beneath a continental plate, causing the formation of deep sea trenches and volcanoes.
Ring of Fire / Archive of Recent Eruptions Around the World / Volcano Live
World Map - Active Volcanoes Shown in RED
~ Types of Volcanoes ~
Types of Volcanoes / Composite & Cinder Cone & Shield / A-Z List of Volcanoes
~ 4 Types of Volcanoes ~
1. Hot Spot Caldera Volcanoes:
( the most violent and explosive eruption style )
Caldera / Yellowstone / Yellowstone Supervolcano
Super Volcano - Discovery / Sci Show does Yellowstone
Above: Yellowstone National Park Caldera Eruption (simulated)
Hot Spot Caldera: Megasupervolcano!
Yellowstone National Park Caldera
"I don't know where I'm a gonna go...when the volcano blow." - Jimmy Buffett
Massachusetts may be a safe zone if Yellowstone erupts.
2. Shield Volcanoes:
( Kilauea in Hawaii is the #1 most active shield volcano in the world )
Anatomy of a Shield Volcano: Quiet "Hawaiian Style" Eruption
Can you notice the profile of an upsidedown warrior's shield?
Below: Mount Kilauea, Hawaii
Question: What is the biggest (shield) volcano in our Solar System?
Answer: Olympus Mons (on planet Mars)
Above and Below: Olympus Mons shown with Mount Everest and Mauna Kea (for scale)
3. Cinder Cone Volcanoes:
( most abundant type of volcano in the world / least deadly & destrucive type of volcano )
Cinder Cone Volcanoes
Cinder Cone volcanoes look a little like ice cream cones.
What is your favorite flavor of cinder cone?
4. Composite (Strato) Volcanoes:
( most violent and deadly mountain style volcano / has all eruption hazards )
Most Stratovolcanoes are so high in elevation, that they are snow-capped.
Stomboli (below) Stratovolcano in Italy is the #1 most active volcano on Earth.
Composite Stratovolcanoes erupt with both lava and ash.
Composite (Strato) Volcanoes
Types of Volcanic Eruptions:
Strombolian, Plinian, Hawaiian, Pelean, Vulcanian