Gelasian
Earliest subdivision of the Quaternary Period / From Wikipedia, the free encyclopedia
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The Gelasian is an age in the international geologic timescale or a stage in chronostratigraphy, being the earliest or lowest subdivision of the Quaternary Period/System and Pleistocene Epoch/Series. It spans the time between 2.58 Ma (million years ago) and 1.80 Ma.[5] It follows the Piacenzian Stage (part of the Pliocene) and is followed by the Calabrian Stage.
Quick Facts Chronology, Formerly part of ...
Gelasian | |||||||||
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2.58 – 1.80 Ma | |||||||||
Chronology | |||||||||
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Formerly part of | Tertiary Period/System Pliocene Epoch/Series | ||||||||
Etymology | |||||||||
Name formality | Formal | ||||||||
Usage information | |||||||||
Celestial body | Earth | ||||||||
Regional usage | Global (ICS) | ||||||||
Time scale(s) used | ICS Time Scale | ||||||||
Definition | |||||||||
Chronological unit | Age | ||||||||
Stratigraphic unit | Stage | ||||||||
Time span formality | Formal | ||||||||
Lower boundary definition |
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Lower boundary GSSP | Monte San Nicola Section, Gela, Sicily, Italy 37.1469°N 14.2035°E / 37.1469; 14.2035 | ||||||||
Lower GSSP ratified | 1996 (as base of Gelasian)[3] | ||||||||
Upper boundary definition | Approximately 8 m after the end of magnetic polarity chronozone C2n (Olduvai). | ||||||||
Upper boundary GSSP | Vrica Section, Calabria, Italy 39.0385°N 17.1348°E / 39.0385; 17.1348 | ||||||||
Upper GSSP ratified | 5 December 2011 (as base of Calabrian)[4] |
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