They were split up into plates.
Alfred Wegener noticed that the outlines of the continents seemed to fit together like pieces of a jigsaw puzzle, particularly the coastlines of South America and Africa. This observation led him to develop the theory of continental drift.
Wegener believed all continents had once been joined because of the similar shapes of coastlines, matching geological formations across continents, and evidence of past glaciation extending from multiple continents, suggesting they were once connected.
Wegener proposed the theory of continental drift because he noticed how coastlines of continents seemed to fit together like pieces of a puzzle. He also observed similarities in rock formations, fossils, and climate across continents that suggested they were once connected. These observations led him to suggest that the continents had moved over time.
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.
Wegener's background as a climatologist helped him notice similar fossil and rock formations, as well as ancient climates, on continents that are now separated by oceans. This led him to propose the theory of continental drift, suggesting that the continents were once joined together and have since drifted apart.
Alfred Wegener
Alfred Wegener noticed that the outlines of the continents seemed to fit together like pieces of a jigsaw puzzle, particularly the coastlines of South America and Africa. This observation led him to develop the theory of continental drift.
volcanos
An earthquake.
Alfred Wegener
Wegener's background as a climatologist helped him notice similarities in rock formations, fossils, and geological structures between continents separated by vast oceans. He realized that these similarities could not be explained by existing theories about seafloor spreading or continental drift. This led him to propose the groundbreaking theory of continental drift, suggesting that the continents were once connected and have since moved apart.
Wegener used evidence from the fit of the continents, the distribution of fossils, and similarities in rock formations and mountain ranges across different continents to support his theory of drifting continents.
Alfred Wegener supported his theory of continental drift by pointing to the fit of the continents, similarities in rock formations and fossils across continents, and evidence of past climates. Additionally, Wegener highlighted the presence of similar species on continents that were once connected.
Wegener's theory of continental drift proved the theory of Pangea (all continents as one land mass).
In 1915 Alfred Wegener wrote a book called "The Origins of Continents and Oceans". Does what it says on the tin basically.
Wegener believed all continents had once been joined because of the similar shapes of coastlines, matching geological formations across continents, and evidence of past glaciation extending from multiple continents, suggesting they were once connected.