Earths crust in motion
an intense shaking of Earth's surface
What is an earthquake
a force tending to cause deformation of a material by slippage along a plane or planes(areas) parallel to the imposed stress.
What is Shearing
The section of rock that extends above a diagonal fault line
What is haging wall
a trough of stratified rock in which the beds dip toward each other from either side
What is Syncline
seismic body waves meaning that they travel through the Earth's interior
What is P waves
Within the Earth rocks are constantly subjected to forces that tend to bend, twist, or fracture them. When rocks bend, twist or fracture they are said to deform or strain
What is stress
a fracture or zone of fractures between two blocks of rock.
What is an fualt
the lower underlying wall of a vein, ore deposit, or coal seam in a mine. : the lower wall of an inclined fault
What is Foot wall
a flat, elevated landform that rises sharply above the surrounding area on at least one side
what is Plateau
rock oscillates perpendicular to the direction of wave propagation.
What is S waves
stress that pulls rock apart in opposite directions. The
What is tension
vertical (or nearly vertical) fractures where the blocks have mostly moved horizontally.
What is Shrike- slip
formed by the movement of large crustal blocks along faults formed when tensional forces pull apart the crust
What is Fault block moutain
“a point at which rays of light, heat, or other radiation meet after being refracted or reflected.
what is focus
a seismic wave that travels along or parallel to the earth's surface
What is Surface waves
forces can cause mountains to form or earthquakes to occur depending on how the Earth's crust reacts to the force.
What is compresion
a dip-slip fault in which the block above the fault has moved downward relative to the block below.
What is an Normal fault
bends or flexures of layered rock that form in response to motion along faults, diapirism, compaction, and regional subsidence or uplift.
What is Folds
The point on the Earth's surface directly above the focus or hypocenter of an earthquake
what is epicenter
instruments used to record the motion of the ground during an earthquake.
What is Seismograph
the changing earth's surface caused by tectonic forces that are accumulated in the crust and then cause earthquakes.
What is deformation
What is an Normal fault
What is a haging wall
a fold that is convex upward,
What is An anticline
caused by the sudden movement of materials within the Earth, such as slip along a fault during an earthquake.
what is seismic Waves
the recording of the ground shaking at the specific location of the instrument.
What is Seismogram