BIO 3102 Study Guide - Mind Map, Anoxic Event, Clathrate Hydrate
Document Summary
Background extinction happen all the time one species is replaced by another or is unable to adapt after surviving a mass extinction. Astroids impact an asteroid hits the earth sending up huge amount of debris and space dust causing a change in temperature which caused extinction. Original hypothesis doesn"t work for all extinctions because the craters from these impacts don"t match up with the time periods of all the extinctions. Elevated carbon global warming (associated with all 5) From volcanos increasing carbon dioxide in the atmosphere causing global warming. From flood basalts which a tears in the earth crust releasing large amount of magma and carbon dioxide. This happens on hot spots where the mantle is thin and usually occurs with continents shifting. This is much more likely as much more co2 is released. Gas hydrates methane producing bacteria that live in the bottom of the oceans.
