GLG 121 Lecture Notes - Lecture 4: Abraham Ortelius, Continental Crust, Continental Drift
4 Oct 2016
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Document Summary
The early earth: protoplanet: the planet transition that occurred early in earth"s history included density separation, creating the layers, kinds of magmas. Granitic (slowly made way to surface pushing its way up) Continental crust: earth had thick cloud cover, lots of volcanoes, little light. Volcanoes spewed water vapor: earth was partially a molten protoplanet. 1564, abraham ortelius published the first well-known map: different continents fit together like a jigsaw puzzle . Edward seuss: put continents together called gondwanaland in 1861, baked apple theory : as earth"s surface cooled off it created mountains and valleys. Alfred wegner 1915 (german meteorologist: proposed the idea that the continents shifted, pursued idea of continental drift in book called, the origins of continents and. Oceans : continent edges matched over 80, when comparing continental shelf margins, that number increased to 90, coined the term pangaea to describe the idea of how to continents lined up.
