During this period, the Earth entered a warm greenhouse phase, supported by high CO2 levels of 4500 ppm, and warm shallow seas covered much of the equatorial land masses. Early in the Silurian, glaciers retreated back into the South Pole until they almost disappeared in the middle of Silurian. Layers of broken shells (called coquina) provide strong evidence of a climate dominated by violent storms generated then as now by warm sea surfaces.
during this period the earth entered a warm greenhouse phase supported by high co2 levels of 4500 ppm and warm shallow seas covered much of the equatorial land masses early in the silurian glaciers retreated back into the south pole until they almost disappeared in the middle of silurian layers of broken shells (called coquina) provide strong evidence of a climate dominated by violent storms generated then as now by warm sea surfaces