Early Earth

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http://youtube.com/watch?v=Xrrvzgpr5Y4

For an introductory college-level oceanography class. For an introductory college-level earth sciences class: a brief review of the formation of early Earth's crust, atmosphere, and oceans. • **This video comes at the beginning of the semester. For a full playlist, refer to the Oceanography or Geology playlists on the Earth Rocks! YouTube Channel. • Content within this video is based on information available in any standard introductory college oceanography or geology textbook, such as Essentials of Oceanography -- Trujillo and Thurman -- OR Essentials of Geology -- Tarbuck and Lutgens -- Pearson Publishing. • Part of a 5-part Earth Formation video series: • Part 1: Earth Formation • Part 2: Radiometric Dating • Part 3: Density • Part 4: Early Earth • Part 5: Life on Earth • If you are an earth science enthusiast and would like to support our ongoing video development and engage with us behind the scenes... • Or if you are a student and would like access to interactive lessons built around these videos... • you can do so by JOINING the Earth Rocks! YouTube Channel: • / @earthrocks . • Thank you! • NOTE: This is a revised version -- fixing the CO2 levels to match current levels. I deleted the original version, which had 3,727 views, 2 comments, 18 thumbs ups, and 0 thumbs downs. • ADDITIONAL NOTE: The video has an error. It says Uranium isotopes are used to determine that water was present on the surface at the time of zircon formation, but it should say Oxygen isotopes. The Uranium isotope ratios are used to determine the age of the rock. The oxygen isotopes are used to determine that liquid water was present during formation. • Source: Nature, 2001 -- Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago, Wilde et al.

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