Lecture 5 (September 11)

Lecture 5 (September 11) - Continental Drift o Continents...

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Continental Drift o Continents can move large distances around the globe with respect to each other o mid 1800s early 1900s Alfred Wegener o The father of plate tectonics o German meteorologist o Main interest was glaciers o In 1915 book, called “Continental Drift.” in which he collated (presented in a coherent fashion) lots of lines of evidence supporting motion of continents o Proposed that all the continents were touching each other, as part of one large continent (existed more than 300 million years ago) o See diagram in notebook (Pangea = all lands), Laurasia, Gonduanaland o 65 million years ago dinosaurs died because they were hit by a meteor/asteroid that hit the gulf coast of Mexico (Yucatan Peninsula) Evidence for Continental Drift cited by Wegener o 1. Fit of the continents o 2. Fit of 300 Ma glaciers (the outward flow directions make sense) Fit of ancient glaciers makes sense only if they formed when
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Lecture 5 (September 11) - Continental Drift o Continents...

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