ERSC 1F90 Midterm: Earth science midterm notes 2016
9 Feb 2016
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Cause if extinction was not extraterrestrial. probable causes. Anoxia (lack of oxygen) and global warming were the two most. Major trigger for global warming: siberian flood basalts. 6 million km ^3 (volume) (would cover basically much of the usa) Gasses come along with the basalt such as c02 and methane (green. Employed many screening tools which started at visual inspection in. Petrography: can look at something through a microscope. The more evidence you have of how something is preserved, the greater the continence will be robust and tell the original story. Global warming tropical seas >40 degrees celsius. Now in 2016 we are over 400 ppm. If the planet is warmed, the ice is melted and sea-level rises, if all sea ice was melted it wont cause a change but the melting of continental ice will change sea levels. Global change in seawater temperature ~ 1 degree celsius (0. 67 degrees in 100 years) Albedo ice melting feedback, permafrost feedback.
