12.1 Evidence for Continental Drift. Wegener came up with the continental drift theory the idea that the continents used to be connected as one big supercontinent but slowly moved apart over time He named the original supercontinent Pangaea.
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Like pieces of a jigsaw puzzle, the continents
fit together into one, large whole.
how entire continents could change locations so his theory was not accepted yet.
ridges are striped with
reversing magnetic fields.
Volcanoes are frequently found on boundaries between tectonic plates.
Note: Hot spots are places magma rises to Earth’s surface that can happen at weak spots in the centre of plates (rather than along the plate boundaries)
Take the Section 12.1 Quiz