Aeronian

Also known as Aeronian Stage, Aeronian Age

In the geologic timescale, the Aeronian is an age of the Llandovery Epoch of the Silurian Period of the Paleozoic Era of the Phanerozoic Eon that began 440.5 ± 1.0 Ma and ended 438.6 ± 1.0 Ma (million years ago). The Aeronian Age succeeds the Rhuddanian Age and precedes the Telychian Age, all in the same epoch.

Key facts

Geologic timespan.name: Aeronian
Geologic timespan.color: Aeronian
Geologic timespan.time_start: 440.5
Geologic timespan.time_start_uncertainty: 1.0
Geologic timespan.time_end: 438.6
Geologic timespan.time_end_uncertainty: 1.0
Geologic timespan.timeline: Silurian
Geologic timespan.name_formality: Formal
Geologic timespan.celestial_body: earth
Geologic timespan.usage: Global (ICS)
Geologic timespan.timescales_used: ICS Time Scale
Geologic timespan.chrono_unit: Age
Geologic timespan.strat_unit: Stage
Geologic timespan.timespan_formality: Formal
Geologic timespan.lower_boundary_def: FAD of the graptolite Demirastrites triangulatus
Geologic timespan.lower_gssp_location: Hlásná Třebaň section, Czech Republic
Geologic timespan.lower_gssp_accept_date: 2024
Geologic timespan.upper_boundary_def: FAD of the graptolite Spirograptus guerichi

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sRGB color hex triplet: A4E0D0
start time: 440800000-
end time: 438500000-

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References

During the Aeronian the Sedgwickii Event occurred in which graptolite diversity was greatly reduced. This event has been attested in locations such as today's Canada, Libya as well as in La Chilca Formation in Argentina (then part of Gondwana).