Earth Layers
This is the central Portion of the earth.
What is the core?
80% of the world's earthquakes occur here.
What is circum-Pacific belt?
The particle or block of solid volcanic ejecta.
What is a pyroclast?
The point deep in the earth where an earthquake begins.
What is hypocenter?
This volcano will probably never erupt again.
What is an extinct volcano?
The middle of the earth's three main layers.
What is the mantle?
The scale used to measure the damage the earthquake does.
What is modified Mercalli?
Large almond or teardrop shaped pieces of ejecta that form when lava solidifies AFTER being thrown high into the air.
What are volcanic bombs?
The instrument used to record the vibrations caused by an earthquake.
What is a seismograph?
This volcano is inactive but can erupt again.
What is a dormant volcano?
The earth's outer layer made of solid rock.
What is the crust?
The study of earthquakes.
What is seismology?
The bowl shaped hollow formed by the collapse of an underground magma chamber.
What is a caldera?
This type of earthquake is caused by sudden movements of rock beneath the earth's surface.
What is a tectonic earthquake?
This volcano type consists primarily of erupted volcanic ash and rock fragments held loosely together.
What is a cinder-cone volcano?
The inner core of the earth is thought to be this.
What is solid?
What is a epicenter?
Large irregularly shaped lump made of lava that hardened BEFORE being thrown out of a volcano?
What are volcanic blocks?
The idea that rocks on either side of a fault spring to a position of little or no stress after an earthquake?
What is elastic rebound?
This volcano type is formed by partly explosive eruptions of ash and rock fragments and partly by mild lava flows.
What is a composite volcano?
Most of the earth's surface is covered by these deposits of sand and mineral fragments, usually laid down by water.
What is sediments?
The earthquake zone stretching from southern Europe to Indonesia.
What is the Alpide Belt?
Superheated cloud of gas and small particles that travels as an avalanche.
What is pyroclastic flow?
The fracture zone between stationary and moving rocks?
What is a fault?
Lava in water that solidifies almost instantly, forming rounded structures.
What is pillow lava?