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Showing below up to 20 results in range #1 to #20.
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- Paleozoic Erathem (944 links)
- Pennsylvanian Subsystem (340 links)
- Absaroka Sequence (339 links)
- Tippecanoe Sequence (284 links)
- Kaskaskia Sequence (250 links)
- Cenozoic Erathem (231 links)
- Ordovician System (230 links)
- Quaternary System (214 links)
- Desmoinesian Series (199 links)
- Pleistocene Series (190 links)
- Champlainian Series (182 links)
- Mississippian Subsystem (180 links)
- Ottawa Limestone Megagroup (173 links)
- McLeansboro Group (128 links)
- Carbondale Formation (127 links)
- Hunton Limestone Megagroup (124 links)
- Blackriveran Stage (117 links)
- Kewanee Group (112 links)
- Pope Megagroup (103 links)
- Chesterian Series (89 links)