Anatomy Lesson
Secondary cracks and passageways through which molten rock flows to the lateral surface of a volcano
What is a side vent?
Type of volcano that dumps rocks, cinders, and ash at the rim of a volcanic crater
What is a cinder cone volcano?
The belly of the beast
HAMMER CAMBAG (2 words)
What is MAGMA CHAMBER?
A river of molten rock spilling down the mountainside
What is a lava flow?
May 18, 1980
What is Mt. St. Helens?
It's what caused the north face of Mt. St. Helens to bulge outward
What is pressure (and heat)?
This feature makes composite volcanoes so steep
What are alternating layers of lava and ash?
It has the same two layers repeated over and over again
VAST NARCO TOOL (1 word)
What is a STRATOVOLCANO?
An avalanche of soil, water, trees, and rocks
What is a lahar?
Its eruption would be globally catastrophic
What is a supervolcano?
Molten rock with high viscosity due to its high silica content
What is rhyolitic magma?
Where volcanoes form at a convergent boundary
What is a subduction zone?
Ahhh! Just how I like it!
SISSY OTA (1 word)
What is ISOSTASY
Toxic gases, cinders, glass, lava bombs, and intense heat that might follow you down the road
What is a pyroclastic flow?
Hawaii's most active shield volcano
What is Mauna Loa?
Bowl-shaped depressions formed at the top of a volcano due to eruptions blowing away the mountain's top
What are craters?
Forms when the roof of an empty magma chamber collapses, causing the top of the volcano to fall downward
What is a caldera?
Like hail, only worse!
OVAL SAM BB (2 words)
What are LAVA BOMBS?
The product of volcanic gases such as sulphur, nitrogen, and carbon mixing with water vapor in the atmosphere
What is acid rain?
Or rather, thar she doesn't blow, because she no longer contains any magma
What are extinct volcanoes?
Mound-shaped molten rocks that harden usually at the site of a side vent
What are lava domes?
Volcanoes cause them, but they do not cause volcanoes to erupt
What are earthquakes?
Too much silica, perhaps
VISION UP PEER LOX (2 words)
What is an EXPLOSIVE ERUPTION?
Ash and rocks too heavy to remain suspended in the atmosphere
What is tephra (fall)?
The type of volcano shown here:
What is a submarine volcano?