ch.4 test Flashcards
what type of stress squeezes a rock layer
compression
a rising layer of rock is called
uplift
tension
stress stretches a rock layer
the two continents Pangea split into over 165 million years ago
Laurasia and Gondwana
GPS ( Global Positioning system)
used to measure the movement of tectonic plates
magma hardens to form new rocks at
mid-ocean ridge
a seismograph is used to measure the
density of Earths layers
fossils and rock layers that are alike and found provide evidence for
continental drift
causes a sinking of rock a rock layer
subsidence
used as evidence for sea floor spreading
magnetic reversals
sea floor spreading takes place at
mid ocean ridges
the single huge continent that once existed
Pangea
when the hanging wall moves downward relative to the foot wall
normal fault
mountains with sharp, jagged peaks are formed from a force is called
fault block
an are where 2 tectonic plates meet is called a
boundary
what type of boundary is formed when plates collide
convergent
in a reverse fault where does the hanging wall move relative to the footwall
up
a type of boundary which causes plates to divide
divergent
plates slide past each other at
transform boundary
3 types of evidence that helps support the theory of continental drift
fossil records, magnetic reversals, and sea floor spreading
the outermost layer of Earth
lithosphere
the liquid layer of the Earths core is called
outer core
at this type of fault usually occurs because of tension
division ( normal fault)
compression occurs
reverse fault
continents which split from the breakup of Gondwana
Africa, Australia, India, Antarctica, South America
the continent of Laurasia split into
North America and Eurasia
