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Oligocene Epoch: Media
geochronology
Images
Indricotherium, detail of a restoration painting by Charles R. Knight.
Courtesy of the American Museum of Natural History, New York
seafloor spreading
Map showing the age of selected regions of the ocean floor. Chronological measurements...
Encyclopædia Britannica, Inc.
geologic time
The stratigraphic chart of geologic time.
Encyclopædia Britannica, Inc. Source: International Commission on Stratigraphy (ICS)
Paleogene Period in geologic time
The Paleogene Period and its subdivisions.
Encyclopædia Britannica, Inc. Source: International Commission on Stratigraphy (ICS)
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