Plate tectonics (chem.) Flashcards
What did Wegener find on opposite sides of the Atlantic ocean ?
- similar plants, animals and fossils were found on opposite sides of Atlantic ocean. Connection.
what were matching on the opposite sides?
- There were matching layers of rock on opposite sides.
Wegener believed there was …
one big super continent called ‘Pangaea’.
How long ago does Wegener think his theory of continental drift happened?
300 years ago.
what happened in continental drift?
the super continent separated and moved away from each other.
What was the cause of continental drift?
Caused by tidal forces and earths rotation.
At the time of Wegener, what explanation was accepted?
That land bridges were there and had been buried by the sea.
Was Wegener’s theory right?
Not exactly, but it was along the right lines.
In the 1960s, what were the geologists convinced about?
Earth crust is made up of several chunks called the tectonic plates, which move and collid to make mountains.
