Vocab 1
Stress that pulls rock layers apart.
What is tension?
Vibrations produced when rocks break along a fault.
What is an earthquake?
A volcano with high silica content in its magma. Erupts with pyroclastic material.
What is an explosive volcano?
A break in the earth's lithosphere
What is a fault?
Stress that squeezes rock until it folds or breaks.
What is compression?
The point beneath Earth's surface where rock breaks under stress and causes an earthquake
What is a focus?
a volcano that erupts with lava flows. It has low silica content in its magma.
What is a non-explosive volcano?
a type of fault where the hanging wall slides upward; caused by compression in the crust
What is a reverse fault?
A "side-to-side" stress.
What is shear?
Point on Earth's surface directly above an earthquake's focus
What is an epicenter?
A broad, gently sloping volcano built from fluid basaltic lavas
What is a shield volcano?
A type of fault where the hanging wall slides downward; caused by tension in the crust
What is a normal fault?
1st wave, P, travels the fastest, back-and-forth waves, move through solids and liquids
What is a primary wave?
using information from 3 seismic stations to locate an earthquake's epicenter
What is triangulation?
ash and debris pile up around the vent resulting in a small, steep-sided cone
What is a cinder cone volcano?
the rocks on either side of the fault slip past each other sideways, with little up or down motion
What is a strike-slip fault?
Arrive second. Move side to side and cannot travel through liquids
What is a secondary wave?
A scale that rates earthquakes by estimating the total energy released by an earthquake
What is a moment magnitude scale?
a large, steep-sided volcano that is made up of a variety of materials, such as lava and ash
What is a composite volcano?
slowest seismic wave but most destructive, L wave
What is a surface wave?