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Date: 2010-05-18 22:29:19Ordovician Historical geology Agnostida Ptychagnostus Stratigraphy Trilobite zone Silurian Monograptus Cambrian Paleozoic Phanerozoic Trilobites | Paleozoic Time Scale and Sea-Level History Time ScaLe R Creator ICSAdd to Reading ListSource URL: engineering.purdue.eduDownload Document from Source WebsiteFile Size: 1,33 MBShare Document on Facebook |
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