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Karl Wooldridge

Surely after a mass extinction the large amount of dead animal and plant material would be around for only the blink of an eye in geologial terms, and so would be unlikely to be a significant new food source or niche?

Elio replies:
You are right about the short duration of the corpses and detritus, but they could have supported a huge population of the fungi at the time. If these particular fungi were especially adept at becoming fossilized, one would expect them to be found in large amounts and constitute a record of what happened in the "blink of the eye".

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