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Ordovician / Historical geology / Agnostida / Ptychagnostus / Stratigraphy / Trilobite zone / Silurian / Monograptus / Cambrian / Paleozoic / Phanerozoic / Trilobites


Paleozoic Time Scale and Sea-Level History Time ScaLe R Creator ICS
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Document Date: 2010-05-18 22:29:19

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File Size: 1,33 MB

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