Earthquakes
A break that appears at the boundary between 2 moving masses of rock
What is a
fault?A volcano which has erupted many years ago but is still thought capable of erupting
What is dormant?
A large bowl-shaped depression formed when an underground magma chamber caves in
What is a caldera?
Type of volcano formed from large amounts of very fluid lava that build up gradually
What is a
Shield Volcano?
Smaller fragments of molten rock that solidify almost instantly
What are
tephra?
These monsterous waves are sometimes caused by earthquakes.
What are
tsunamis?
Volcanoes that have not erupted in recorded history and are unlikely to ever erupt
What is extinct?
Holes or cracks serving as escape vents for underground gases.
What are fumaroles?
This type of volcanic eruption produces lava fountains or fire mountains
Hawaiian eruption?
The study of earthquakes
What is
seismology?
The point underground where an earthquake begins
What is the
focus?
melted rock
What is magma?
A large depression at the top of a shield volcano
What is a crater?
Type of volcano that is formed by eruptions of mostly tephra and very little lava
What is a
Cinder Cone Volcano?
The boundary between the earth's crust and its mantle
What is
Moho or
Mohorovicici discountinuity?
The place at ground level that is directly above the focus
What is the
epicenter?
Name of the many volcanoes which run along the edge of the Pacific Ocean
What is
The Ring of Fire?
What is a
vent?This type of volcanic eruption is characterized by hot clouds of gas and dust that it expels
What is
Plinian eruption?
The process by which new soil is formed as rocks crumble and break into smaller pieces
What is
weathering?Any trembling or shaking of the earth's crust
What is can earthquake?
The measurement of an earthquake's strength
What is
magnitude?
Molten rock that has reached the earth's surface
What is lava?
Type of volcano that forms from alternating layers of tephra and lava
What is a
Composite Volcano?
Name for underwater mountain ranges
What are
Mid-oceanic ridges?