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the “calendar” for events in Earth history.
Geologic time scale
the assembly of most or all of Earth's continental blocks or cratons to form a single large landmass.
supercontinent
one plate going under the other
subduction
plates that slide past eachother
transform boundary
long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another.
Continental drift describes one of the earliest ways geologists thought continents moved over time.
continental drift
the rigid outer part of the earth, consisting of the crust and upper mantle.
lithosphere
lowland region that forms where Earth's tectonic plates move apart, or rift.
rift valley
large landmass, often referred to as a supercontinent, that formed during the late Neoproterozoic (about 550 million years ago)
gondwana
laurasia
one of the two ancient supercontinents produced by the first split of the even larger supercontinent Pangaea about 200 million years ago, comprising what are now North America, Greenland, Europe, and Asia
boundary is an area on Earth where two or more lithospheric plates collide.
convergent boundary
where 2 plates meet
plate boundary
divergent boundary in the atlantic ocean
seafloor spreading
plates moving away from eachother
divergent boundary
formed from convergent continental Continental
mountans
mountains in the ocean
mid ocean ridge
asthenosphere
name of super contintent
pangea
tectonic plate
scientific theory that explains how major landforms are created as a result of Earth's subterranean movements.