Flashcards: Tectonics


Sedimentary rocks are deposited in horizontal layers
Slowest earthquake waves
Point in the earths crust where an earthquake originates
Tectonic plates coming together
Solid iron & nickel
Device used to detect earthquake waves
Long chain of undersea volcanic mountains located at a divergent plate boundary
Area on the Earth's surface that receives neither P nor S waves from a particular earthquake
The study of the magnetic properties of ancient rocks
A boundary between the crust and the outer part of the mantle
Mostly granitic rock
The north and south magnetic poles switch positions
Forms in the ocean at subduction zones
Kind of earthquake waves that can go through solids but not the liquid outer core
A recording of an earthquake made by a seismograph
Minimum number of reporting seismic stations needed to pinpoint the location of an earthquake
Formed where two plates are sliding past one another
What the sea floor is made from
The processes that are shaping the Earth today are the same processes that have been at work in the past
The force driving plate tectonics
The plastic part of the mantle just below the crust
Liquid iron part of the earth
Kind of boundary formed where plates move apart
Theory that describes changes in the crust in terms of establishing and re-establishing equlibrium
The rim of the Pacific ocean
Area of very thick sedimentary deposits, sinking and filling at the same time
Point on the surface of the earth directly above the earthquake focus
A break in the Earth's crust along which motion occurs
Fastest earthquake waves
A location on the Earth's surface that has experienced active volcanism for a long period of time. Examples: Hawaii, Yellowstone
Occurs when one plate dives down beneath another
Kind of earthquake wave that can travel through both the solid and liquid parts of the earth's interior
3 kinds of displacement of rock
Scale used to measure earthquake intensity (magnitude)
Scale used to measure earthquake effects (damage)
Where the youngest sea floor rock is found
Law of 'Original Horizontality'
S waves
Convergent boundary
Inner core
Mid Ocean Ridge
Shadow zone
Continental crust
Magnetic reversal
Transform boundary
Convection currents in the mantle
Outer core
Divergent boundary
Ring of fire
Hot Spot
Tilting, folding, and faulting
Richter scale
Mercalli scale
On the mid-ocean ridge