An Era spanning 542.0 (±1.0) to 251.0 (±0.4) million years ago, comprising – from oldest to youngest – the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian Periods.
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An Era spanning 542.0 (±1.0) to 251.0 (±0.4) million years ago, comprising – from oldest to youngest – the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian Periods.
