ECU Libraries Catalog
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Era
- Cretaceous267
- 20th century210
- Tertiary185
- Quaternary172
- 19th century156
- Paleozoic145
- Precambrian141
- Devonian132
- Cenozoic120
- Pleistocene110
- Eocene102
- Ordovician101
- Mesozoic97
- Miocene97
- Pennsylvanian96
- Permian96
- Mississippian88
- 18th century85
- Jurassic71
- Triassic69