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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Cambrian
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INFOTEXT
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1992-09-03
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301b
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10 lines
Cambrian is the period of geological time
570-510 million years ago. It was the first
period of the Palaeozoic era.
All invertebrate animal life appeared, and
marine algae were widespread. The earliest
fossils with hard shells, such as
trilobites, date from this period.
Subject by: Russell Webb