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Fforest Fawr Geopark

Wales' First European Geopark

Ordovician Timechart

The oldest period to be represented in the rocks of Fforest Fawr Geopark; it lasted from 488 to 443 million years ago.

The Ordovician Period

This period extended over 45 million years.  It is divided into three series/epochs, which are further subdivided into various stages/ages.

        • Late/upper Ordovician epoch
          • Ashgillian stage
          • Caradocian stage
        • Middle Ordovician (Llanvirnian) epoch
          • Llandeilian stage
          • Abereiddian stage
        • Early/lower Ordovician epoch
          • Arenigian stage
          • Tremadocian stage
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