Disasters such as volcanic eruptions and extinctions seem to occur more frequently – this is determined by the “pulse” It affects every 27.5 million years, A new study found.
Researchers have used advanced radioisotope dating technology to determine disasters such as sea level rise and volcanic eruptions.
They found that such events were “accidental and obvious.” The major is related to the recurring cycles of major geological events.
The last cycle was 7 million years ago, which means it must have been 20 million years before another round of such an event.
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Michael Rampino, a geologist and professor of biology at New York University, said: “Many geologists believe that geological events occur randomly over time. But our study provides statistics for common cycles, showing that these geographical events are interrelated and random. “
Researchers have previously suggested a cycle of major geological events, including volcanic activity 26 to 36 million years ago and massive extinctions on land and at sea.
But many incidents are difficult to pinpoint.
There has been a significant increase in radioisotopic dating and changes in geological timescale in recent years, generating new data about the timing of past events.
Rampino and colleagues analyzed 89 major and obsolete geographical events over the past 260 million years.
These include ocean and land extinction, large volcanic lava eruptions, flood basalt eruptions, ocean flow from oxygen, fluctuations in sea level, and changes or rearrangements of the Earth’s tectonic plates.
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They found that these global geological events are classified into 10 different time points over 260 million years, divided into peaks or pulses about 27.5 million years apart.
Researchers believe that these impulses may be a function of the working cycles in the Earth’s interior – geophysical processes associated with plate tectonics and climate dynamics.
On the other hand, a similar cycle in the Earth’s orbit in space would rhythm these events.
Rampino said, “Regardless of the origin of these cyclical episodes, our results support a largely periodic, coordinated and sometimes catastrophic geological record that differs from the views of many geologists.”