Stress that squeezes rock until it folds or break
compession
The hypothesis that the continents stay move across earth's surface
continental drift
a bowel shaped area that forms around a volcano central opening
crater
a deep valley along the ocean flooe beneath which oceanic crust slowly sinks toward the mantle
deep ocean trench
a plate boundary where two plates move away from each other
divergent boundary
not currently active but able to become active in the future
dormant
term used to describe a volcano that is no longer active and is unlikely to merupt again
extinct
a break in earth's crust along which rocks move
fault
the preserved remains or traces of an organism that lived in the past
fossil
an area where magma from deep within the mantle melts through the crust above
hotspot
a string of volcanoes that form as the results os subduction of one oceanic plate beneath a second oceanic plate
island arc
liquid magma that reaches the surface
lava
the area covered by lava as it pours out od a volcanos vent
lava flow
the mollen mixture of rock forming substances, gases, and water from the mantle
magma
the pocket beneath a volcano where magma collects
magma chamber
an undersea mountain chain where ner ocean floor is produced
mid ocean ridge
a type of fault where the hanging wall slides downward caused by tension in the crust
normal fault
the name of the single landmass that begin to break apart 200 million years ago
pangae
a long tube through magma moves from the magma chamber to earth's surface
pipe
a section of the lithosphere that swoly moves over the asthenosphere, carrying pieces of continental and oceanic crust
plate
the theory that pieces of earth's lithosphere are in constant motion, driven by convection currents in the mantle
plate tectonics
a large landform that has high elevation and a more or less level surface
plateau
Aa weak spot in the crust where magma has come to the surface
volcano
the opening through which molten rock and gas leaves a volcano
vent
a plate boundary where two plates move past each other in opposite directions
transform boundary
stress that streches rock so that it becomes thinner in the middle
tension
the process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle
subduction
a type of fault in which rocks on either side move past each other sideways with little up or down motion
strike slipe fault
a force that acts on rock to change its shape or volume
stress
a material found in magma that formed from the elements oxygen and silicon
silica
stress that pushes masses of rock in opposite directions in a sideways movement
shearing