Fossil Crinoids from Burlington, IA
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group of Burlington camerate crinoids |
slab of Burlington crinoids |
Burlington crinoid Macrocrinus-verneuilianus |
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Uperocrinus pyriformis crinoid from the Burlington Limestone |
camerate crinoid from the Burlington ar Uperocrinus pyriformis crinoid from the Burlington Limestone |
Burlington crinoid Eretmocrinus |
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