There are cycles to the sediments...

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There are cycles to the sediments...

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Non-marine animals (amphibians, reptiles, birds and mammals) have apparently experienced at least 10 distinct episodes of intensified extinctions over the past 300 million years. Eight of these extinction events are concurrent with known marine mass extinctions, which previously yielded evidence for an underlying period of 26.4 to 27.3 million years ago. In new research, a team of scientists from New York University and Carnegie Institution for Science performed an analysis of the ten recognized non-marine mass extinctions and detected a statistically significant underlying periodicity of 27.5 million years; they also found that these mass extinctions align with major asteroid impacts and devastating volcanic outpourings of lava called flood-basalt eruptions.
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Coyote jaw dry land scatter
It seems that large-body impacts and the pulses of internal Earth activity that create flood-basalt volcanism may be marching to the same 27-million-year drumbeat as the extinctions, perhaps paced by our orbit in the Milky Way Galaxy,” said lead author Professor Michael Rampino, a researcher in the Department of Biology at New York University.

About 66 million years ago, 70% of all species on land and in the seas, including the non-avian dinosaurs, suddenly went extinct, in the disastrous aftermath of the collision of a large asteroid or comet with the Earth.

Subsequently, paleontologists discovered that such mass extinctions of marine life, in which up to 90% of species disappeared, were not random events, but seemed to come in a 26.4-27.3 -million-year cycle.

In their new study, Professor Rampino and colleagues examined the record of mass extinctions of land-dwelling animals and concluded that they coincided with the extinctions of ocean life.

https://www.nyu.edu/about/news-publicat ... imals.html

The good news is we are in the middle of THAT cycle
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