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. Particularly in the late devonian extinction events may relate to periods of abrupt cooling associated with the development of glaciers and the substantial lowering of sea level it has been argued that patterns of faunal change at the kellwasser event are consistent with global cooling. Mcghee g the late devonian mass extinction the frasnian famennian crisis critical moments in paleobiology and earth history series mcghee george r isbn 9780231075046 kostenloser versand fur alle bucher mit versand und verkauf duch amazon. The devonian extinction events were a series of extinctions that mainly affected the marine species during the devonian period approximately 419 million to 359 million years ago there were three major extinctions during the last half of the devonian period each separated by about ten million years
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