An earthquake.
volcanos
Alfred Wegener proposed the theory of continental drift, suggesting that the continents were once part of a supercontinent called Pangaea that broke apart and drifted to their current positions due to the movement of the Earth's tectonic plates. He suggested that the continents "plowed" through the oceanic crust as they moved.
wegener
Alfred Wegener theorize that all the continents were once joined together in a single landmass and have since drifted apart.
One piece of evidence that led Wegener to propose the theory of continental drift was the observation that the coastlines of Africa and South America appeared to fit together like puzzle pieces. This suggested that the continents were once joined together and had subsequently drifted apart.
They were joined together, then drifted apart to their current positions
Wegener proposed the theory of continental drift, suggesting that Pangaea, a supercontinent, gradually broke apart over millions of years due to the movement of tectonic plates. He believed that the continents drifted to their current positions.
Wegener proposed the theory of continental drift, suggesting that the continents were once connected in a single landmass called Pangaea. He proposed that the continents drifted apart over time due to the movement of the Earth's crustal plates.
The idea of continents moving is known as the theory of plate tectonics, and it was proposed by Alfred Wegener in the early 20th century. Wegener suggested that continents were once joined together in a supercontinent called Pangaea and have since drifted apart.
Alfred Wegener called his theory of moving continents "continental drift." He proposed that Earth's continents were once joined together in a single supercontinent called Pangea, which later broke apart and drifted to their current positions.
Wegener believed that all continents were once part of a supercontinent called Pangaea, which began breaking apart about 200 million years ago. He proposed the theory of continental drift to explain the movement of the continents over time.
Alfred Wegener, a German meteorologist and geophysicist, proposed the theory of continental drift in the early 20th century. He suggested that continents were once part of a single supercontinent called Pangaea and gradually drifted apart over time.