Ch.25 Flashcards
discovered a system of mountain ranges on the seafloor seperated by valleys
Mid-Ocean Ridge
A long narrow depression
rift valley
The boundary where two plates collide
convergent plate boundary
when a thick and buoyant continental plate meets a thin and dense oceanic plate, the denser plate dices
subduction
The boundary between two plates that are moving apart
divergent plate boundary
The type of boundary where plates slide horizontally past each other in opposite directions
Transform plate boundary
The sudden movement or vibration of the ground that occurs when rocks slip and slide along enormous cracks in earth’s crust
Earthquake
is a crack in earth’s crust along which rock has moved
fault
this sudden release of strain energy as rock moves along a fault
Elastic rebound
The point of origin for an earthquake
focus
the point on earths surface above the focus
epicenter
Who came up with the continental drift hypothesis
Alfred Wegener
What is evidence of this theory
Wegener argued that you could match rock types
What was the name for the super continent
Pangaea
Who came up with the seafloor spreading hypothesis
Harry Hess
