This is a list of official and unofficial names for time spans in the geologic timescale and units of chronostratigraphy. Since many of the smallest subdivisions of the geologic timescale were in the past defined on regional lithostratigraphic units, there are many alternative names that overlap. The body concerned with standardizing the names of geochronologic units is the International Commission on Stratigraphy (ICS). In 2008 however, even though the Phanerozoic eon is almost completely divided into internationally recognizable units, local subdivisions are often still preferred over the international ones. An official list of start dates as recognized by the ICS is also available.
List
See also Astronomical chronology Age of the Earth Age of the universe Chronological dating, archaeological chronology Absolute dating Relative dating Phase (archaeology) Archaeological association Geochronology Chronostratigraphy Future of the Earth Geologic time scale Geological history of Earth Plate reconstruction Plate tectonics Thermochronology Timeline of natural history General Consilience, evidence from independent, unrelated sources can "converge" on strong conclusions
References
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