5_plate_tectonics_A

5_plate_tectonics_A - Plate Tectonics I GS222 Lecture 5...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Plate Tectonics I GS222 Lecture 5 Overview - this lecture When did people first suspect the continents move? What were the early hypotheses? What role did technology play in plate tectonics? Why were geomagnetic reversals key to the establishment of plate tectonic theory? Early speculation For most of human history, it was believed that continents were fixed and immutable During the 16 th century CE, DaVinci & Ortelius noticed the continents fit together, especially South America and Africa Antonio Snider published earliest map in 1858 a French geographer found identical fossils in U.S. and Europe believed that Biblical flood caused the break-up of supercontinent many scientists made similar observation in 1800s The continental jigsaw puzzle from “Creation and Its Mysteries Unveiled” Continental Drift For > 150 years, geographers and scientists suggested continents move Only recently (in the last 50 years) have scientists agreed on theory of plate tectonics Alfred Wegener proposed hypothesis of continental drift in 1915 (first detailed account) a German meteorologist initiated 100 year scientific process from hypothesis to well-tested theory perished in 1930 Greenland expedition, well before his idea had gained acceptance The scientific process Collection of scientific facts through observation and measurement. A tentative, testable statement about the natural world that can be used to build more complex inferences and explanations. Development of observations, experiments, and models to test (and, if necessary, revise) the hypothesis....
View Full Document

This note was uploaded on 01/20/2012 for the course GEO 222 taught by Professor Davidlund during the Winter '11 term at University of Michigan.

Page1 / 27

5_plate_tectonics_A - Plate Tectonics I GS222 Lecture 5...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online