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• n  from 544 million to about 230 million years ago
• a  of or relating to or denoting the Paleozoic era

• They used to play tag around the mastodons and the paleozoic fossils.
• This, in effect, is what the fish did; the cells in the bodies of land vertebrates, including man, are bathed in a fluid much like the thin brine of the paleozoic sea.

• Paleozoic
• Paleozoic era

News & Articles

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  Panama Rocks Park. Explore an erupted Paleozoic seashore with 12 acres of towering rocks, cavernous dens and old growth forest, hiking trail. Open from 10 a.m. to 4 p.m. daily through Oct. 20.
  Sept. 24, 2013 - The Buffalo News

Quotes

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• Spencer G. Lucas in CBS News
  The Robledo Mountains are the scientific Rosetta Stone of our understanding of Paleozoic footprints,said Lucas, who was first shown the tracks in the early 1990s.