If you are looking for an in depth (pop-sci) dive into the mass extinctions in earth's history definitely check out "The Ends of the World" by Peter Brannen. It covers the five mass extinctions with a good mix of scientific detail and entertaining writing. IIRC it discusses the likelier explanations for Silurian extinctions including disruptions to the carbon-silicate cycle (volcanism -> fresh silicate rocks -> weathering removes CO2 from the atmosphere as ultimately insoluble CaCO3 -> global ice age), anoxia/CO2 drawdown caused by increased phosphorous and other nutrient availability, and others."The Ends of the World" stands out as a top disaster book along with Simon Winchester's "Krakatoa" and Sebastian Junger's "The Perfect Storm".
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