Some articles on devonian, early devonian:
... The Devonian (408 to 362 million years ago) was a relatively warm period, and probably lacked any glaciers with reconstruction of tropical sea surface ... CO2 levels dropped steeply throughout the Devonian period as the burial of the newly-evolved forests drew carbon out of the atmosphere into sediments this may be reflected by a Mid-Devonian cooling ... The Late Devonian warmed to levels equivalent to the Early Devonian while there is no corresponding increase in CO2 concentrations, continental ...
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“Foolish prater, What dost thou
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—Abraham Cowley (16181667)