Science, Space and Technology News 2024
Recent findings by Johns Hopkins University reveal that prehistoric worms played a crucial role in boosting oxygen levels through sediment mixing, thereby contributing significantly to the Great Ordovician Biodiversification Event and the explosion of new species approximately 480 million years ago.
Researchers measured pyrite from nine sites along a Maryland shoreline of the Chesapeake Bay that serves as a proxy for early ocean conditions. Sites with even just a few centimeters of sediment mixing held substantially more pyrite than those without mixing and those with deep mixing. The new data suggests that a small amount of sediment mixing in water with very low levels of oxygen would have exposed buried pyrite, sulfur, and organic carbon to just enough oxygen to kick-start the formation of more pyrite.
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