Let's
Define It
Define It
When two fault blocks move past each other horizontally. What type of fault is this?
Strike-Slip Fault
Earthquakes occur when these shift.
Tectonic Plates
When plates slip past each other, this is known as what type of boundary?
transform
This form of stress squeezes the earth together.
Compression
A wave or series of waves produced by an earthquake or landslide.
Tsunami
When the hanging wall moves down relative to the foot wall.
Normal-Fault
Mid ocean ridges are formed by what type of plate movement?
Diverging plates
Volcanoes occur at this type of boundary.
Convergent
An ocean trench is formed due to ?
Subduction
A seismograph measures what?
seismic waves produced by earthquakes.
When the hanging wall moves up relative to the foot wall.
Reverse Fault
This fault is caused by compression
Reverse Fault
Strike-slip faults most commonly known for these.
Earthquakes
Old ocean floor is destroyed, absorbed by the Earth, and remelted beneath
ocean trenches
A single number that geologists use to assign an earthquake based on the Earthquake's size.
magnitude
This arch that bends upward is created by compression
Anticline
This fault results when two plates move past one another, with little or no up or down movement.
Strike-Slip Fault
Mid-ocean ridges and rift valleys occur at what type of boundary.
Divergent Boundary
As two continental plates contact each other, neither returns to the Earth’s mantle because their __________ is nearly the same.
density
What is the difference between the focus and the epicenter?
Focus = where the earthquake starts under the earth
epicenter = The point on the Earth's surface directly above the focus is the epicenter.
This arch that bends downward is called _______ and is created by what type of stress?
Syncline, compression
What causes sea-floor spreading?
molten rock flows up through a crack in Earth's crust and hardens into solid strips of new rock on both sides of the crack
Name the three boundaries and the stress types for each.
convergent/ compression
divergent/tension
transform/ shearing?
A plate carrying oceanic crust collides with a plate carrying continental crust
Deep Ocean Trench Volcano
Name the 3 type of waves and their movements.
P Waves (Primary)= Fastest, compress and expand
S waves (secondary) = second, move side to side or up and down
Surface waves = rolling or circular motion