Ancient life zones and Silurian fossil clues explored
The article surveys Azoic rocks as ancient, highly metamorphic layers with rare fossils, notes possible Protozoic links, and chronicles the Eozic Dawn of life with Protozoa, club mosses, ferns, and a meager seven living forms. It traces the Paleozoic split after a long blank interval, and outlines Silurian features such as corals, crinoids, brachiopods, and early fishes, ending with Devonian plants and giant amphibians.
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Canada
Labrador
Ferocius Shark
Squaliadont
Iethrus
Caluoun
Cuaucis
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