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USGS 1:24K Quadrangle
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Arthropods

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ED2852 Shrimp in nodule
ED2852 Shrimp in nodule  
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ED0206 Elrathia kingi trilobite
ED0206 Elrathia kingi...  
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ED0202 Cryptolithus tesselatus (cast) trilobite
ED0202 Cryptolithus...  
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ED2748 Atlantic horseshoe crab
ED2748 Atlantic horseshoe crab  
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ED1202 Diacalymene sp. trilobite
ED1202 Diacalymene sp....  
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ED1203 Diacalymene sp. trilobite
ED1203 Diacalymene sp....  
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ED1250 Goose barnacles
ED1250 Goose barnacles  
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ED1248 Isotelus iowaensis trilobite
ED1248 Isotelus iowaensis...  
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ED1245 Isotelus iowaensis trilobite
ED1245 Isotelus iowaensis...  
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ED1247 Isotelus iowaensis trilobite
ED1247 Isotelus iowaensis...  
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ED1488 Trilobite
ED1488 Trilobite  
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ED1287 Trilobite
ED1287 Trilobite  
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ED1286 Trilobite
ED1286 Trilobite  
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ED2492 Barnacle
ED2492 Barnacle  
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ED2285 Elrathia kingii trilobite
ED2285 Elrathia kingii...  
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ED2473 Barnacle
ED2473 Barnacle  
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ED2468 Barnacle
ED2468 Barnacle  
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ED2717 Trilobite
ED2717 Trilobite  
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ED2697 Isotelus iowaensis trilobite
ED2697 Isotelus iowaensis...  
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ED2835 Trilobite
ED2835 Trilobite  
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ED2849 Phacops sp. trilobite
ED2849 Phacops sp. trilobite  
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ED2876 Trilobite with brachiopod
ED2876 Trilobite with...  
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ED0221 Eurypterus sp. (cast) sea scorpion
ED0221 Eurypterus sp....  
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ED1244 Isotelus iowaensis trilobite
ED1244 Isotelus iowaensis...  
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ED0211 Trilobite
ED0211 Trilobite  
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ED0210 Trilobite
ED0210 Trilobite  
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ED0208 Basidechenella sp. trilobite
ED0208 Basidechenella sp....  
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ED0201 Trilobite
ED0201 Trilobite  
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ED0200 Calymene sp. trilobite
ED0200 Calymene sp. trilobite  
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ED0199 Calymene sp. trilobite
ED0199 Calymene sp. trilobite  
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ED0215 Trilobite in fossiliferous limestone
ED0215 Trilobite in...  
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ED0216 Phacops sp. trilobite
ED0216 Phacops sp. trilobite  
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ED0429 Isotelus iowaensis trilobite
ED0429 Isotelus iowaensis...  
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ED0217 Trilobite
ED0217 Trilobite  
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ED0220 Trilobite
ED0220 Trilobite  
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ED0203 Calymene sp. trilobite
ED0203 Calymene sp. trilobite  
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ED0204 Trilobite
ED0204 Trilobite  
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ED0214 Ogygiocarella sp. trilobite
ED0214 Ogygiocarella sp....  
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Arthropod drawer
Arthropod drawer  
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ED1270 Drotops megalomanicus (cast) trilobite
ED1270 Drotops...