大陆漂移学说英文版

2021/4/4
5
Support for Continental Drift
2. FOSSIL EVIDENCE
SAME FOSSILS: DIFFERENT CONTINENTS
Mesosaurus was incapable of swimming across a large
ocean.
2021/4/4
▪ A prime example are the Appalachian Mountains in the eastern U.S and the Caledonian Mountains in the British Isles.
2021/4/4
7
Support for Continental Drift
6
Support for Continental Drift
3. ROCK EVIDENCE – Mountain ranges
▪ SAME ROCK: DIFFERENT RANGE Existing mountain ranges separated by vast oceans contain rocks of identical mineral content.
▪ People couldn’t image a force great enough to move the continents
BUT by the 1960’s evidence would prove
continental drift is TRUE and…. The story
continues (as does all good science!)
▪ Wegener was not the only one to notice the fit of the continents.
▪ 1858: Antonio Pelligrini depicted Africa and South America connected.
▪ He was one of the first scientists to publish maps depicting the apparent fit of the continents.
CONTINENTAL DRIFT
/movi es/outreach/sumatra/pangaea.mov
2021/4/4
1
Alfred L. Wegener
▪ Geologist Alfred Wegener noticed similar rocks & fossil remains were found on continents which seemed to fit together
2021/4/4
10
感谢您的阅读收藏，谢谢！
2021/4/4
11
2021/4/4T IN DOUBT
Why didn’t people believe in continental drift?
▪ People couldn’t image how the earth could be millions of years old
2021/4/4
3
Support for Continental Drift
1. SHAPE OF THE CONTINENTS
Continents fit together like puzzle pieces
2021/4/4
4
Support for Continental Drift
1. SHAPE OF THE CONTINENTS
▪ He called this “super” continent called Pangaea
▪ In 1912 Wegener
published the
first version &
died defending
h2is021/t4h/4eory
2
PANGAEA
the large landmass that included all of Earth’s present day continents
4. GLACIAL SCARS
SAME SCARS: DIFFERENT CONTINENTS
2021/4/4
8
Support for Continental Drift
5. LOCATION OF COAL DEPOSITS
Coal deposits have been found in temperate and polar regions; however, coal is formed in tropical regions.