The Sinsk event occurred during the Cambrian period, which was 53.4 million years long between two ice ages and it saw a huge diversification of life on Earth known as the Cambrian explosion.
A massive extinction known as the Sinsk event happened just as life expanded beyond parallel. Now scientists know that tectonic plates caused it.
The Sinsk event killed off major groups including conical animals known as hyoliths with mustaches or curls for arms and sponges called archaeocyathids which look like cartoons. They diversified into hundreds of species that created the first reefs around the globe called the archaeocyathids reefs. They were destroyed by this cataclysmic event.Geologists already knew that falling levels of oxygen prompted the Sinsk event, but they didn’t know why that happened until now.
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