LPKW+1.3

toc

=1.3 Drifting Continents=

Vocabulary
Pangaea-meansall lands-or that all the continents were together Continental drift-contenents slowly moving fossil-any trace of an ancient organism that is preserved in rock

Intro

 * Africa and South America look like jigsaw puzzles

The Theory of the Continental Drift

 * 1910 Alford Wegener
 * hypothesis was that the continents were once joined together
 * 300 million years ago

Evidence from landforms

 * mountains
 * lined up with South America and Argentina
 * coalfields
 * European coalfields with North America

Evidence from fossils

 * found common dinosaur and plant fossils on different continents

Evidence from climate

 * Current continents have different(scrambled) glacial deposits

= =

Scientist Reject Wegner's Theory

 * lacked an explanation about how continents drifted