The late devonian extinction was one of five major extinction events in the history of life on earth a major extinction the kellwasser event occurred at the boundary that marks the beginning of the last phase of the devonian period the famennian faunal stage the frasnian famennian boundary about 376 360 million years ago. Late devonian mass extinctions one of the big five scientists recognize a number of mass extinctions extinction events that far exceed background extinction rates and are not taxonomically restricted five of these were particularly severe the terminal ordovician late devonian terminal permian terminal triassic and terminal cretaceous. Home understanding extinction mass extinctions late devonian extinctions there are three important extinctions in latter half of the devonian period each separated by about 10 million years only one of these at the end of a time interval called the frasnian is normally considered large enough to be one of the big five. Devonian extinctions a series of several global extinction events primarily affecting the marine communities of the devonian period 4192 million to 359 million years ago at present it is not possible to connect this series definitively with any single cause it is probable that they may record a combination of several stresses such as excessive sedimentation rapid global warming or . Earth science education late devonian mass extinction extinction files bbcarticles on mass extinctions hannover park hooper virtual museumshort summary of late ordovician mass extinction includes facts geologic setting species affected and likely cause as continental glaciation
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