Volcanoes
A volcano that consists primarily of erupted volcanic ash and rock fragments held loosely together
What is a Cinder-cone volcano?
The earth's outer layer made of solid rock...
What is the crust?
The study of earthquakes
What is seismology?
A particle or block of solid volcanic ejecta
The most abundant element in the earth's crust
What is oxygen?
A volcano that probably will not erupt again
What is an extinct volcano?
The study of the earth
What is geology?
The fracture zone between stationary and moving rocks
What are faults?
Solid particles less than 2mm in diameter
What is volcanic ash?
The channel in a volcano through which gases, ash and magma are ejected
What is a vent?
A volcano that is inactive but can erupt again
What is a dormant volcano?
The inner core of earth is thought to be...
What is solid?
The idea that rocks spring back to a point of little resistance
What is the elastic rebound theory?
Irregularly shaped lump of lava that hardened before being thrown
What are volcanic blocks?
The type of fault that occurs when one side is shoved over the other side
What is a thrust fault?
A volcano formed partly by explosive eruptions of ash and rock fragments and partly by mild lava flow
What is a composite volcano?
The area between the upper mantle and the lower mantle
What is the transition zone?
The fastest of earthquake waves
What are P waves?
Lava in water solidifies almost instantly forming rounded structures
What is pillow lava?
This is likely to cause a volcanic eruption to be violent
What is gas?
A bowl-shaped hollow formed by the collapse of an underground magma chamber
What is a caldera?
The boundary between the mantle and core...
What is the core-mantle boundary? (or Gutenberg discontinuity)
The scale used to measure the damage an earthquake does
What is the Modified Mercalli scale?
Solid ejecta larger than 2mm but less than 64mm in diameter
What is lapilli?
What is shallow focus?