| Basilosaurinae(noun, fauna, eocene, extinction) |
| Bathysoma(noun, fauna, extinction, paleocene) |
| Bemalambdidae(noun, fauna, extinction, paleocene) |
| Bennettitales(noun, fauna, extinction, oligocene) |
| Bisonalveus(noun, fauna, extinction, paleocene) |
| Boffius(noun, fauna, extinction, paleocene) |
| Boltysh crater(expression, geology, crater, paleogene) |
| Brontotheriidae(noun, fauna, eocene, extinction) |
| Caedocyon(noun, fauna, extinction, oligocene) |
| Calamophylliopsis(noun, fauna, extinction, oligocene) |
| Calciavis(noun, fauna, eocene, extinction) |
| Cercamoniinae(noun, fauna, eocene, extinction) |
| Cernaysia(noun, fauna, extinction, paleocene) |
| Chattian extinction(expression, extinction, period, geochronology) |
| Chicxulub crater(expression, geology, crater, paleogene) |
| Chota Formation(expression, geohistory, formation, paleogene) |
| Chulpasia(noun, fauna, eocene, extinction) |
| Cimexomys(noun, fauna, extinction, paleocene) |
| Cimolodonta(noun, fauna, eocene, extinction) |
| Cimolodontidae(noun, fauna, extinction, paleocene) |