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Learn about life through time... Silurian

During the Silurian period (409-439 MYA), the warm shallow waters near the shores of continents became filled with life. Sponges formed great reefs, which were able to grow and spread over the sea floor. Echinoderms like sea lilies and starfish abounded, along with trilobites and brachiopods.

These creatures were so abundant that their remains amassed on the sea bed, later to form fossiliferous limestone.

 

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