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Which geologic period followed the Cambrian Period?

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The geologic period that followed the Cambrian Period is the Ordovician Period.12

The Ordovician Period began approximately 485.4 million years ago and lasted until about 443.8 million years ago. It was established as a distinct system in 1879 by the geologist Charles Lapworth to resolve a long-standing scientific dispute regarding the boundaries between the Cambrian and Silurian systems.123