Eocene - Source page for the Eocene system, including invertebrates, vertebrates, biostratigraphy and geology.
Eocene Fossils - Images of Eocene (36-56 million years ago) fossil insect and plant specimens collected from the Green River Formation in Northwestern Colorado, USA.
European Caenozoic Contact Group - International contact group which tries to link professional paleontologists with advanced amateurs to further mutual contact and cooperation.
Quaternary Entomology Laboratory - A lab specializing in the analysis and application of Pleistocene and Holocene insect remains for paleoenvironmental analyses. Located in the Department of Geosciences, North Dakota State University
Tertiary Mammals - Exhibit of mammals from the Tertiary at the Paleontological Institute in Moscow.
The Tertiary Research Group - London-based specialist geological society with an interest in the Tertiary period worldwide. Provides information on events, membership and the journals "Tertiary Research" and "Cainozoic Research".