File:Mollweide_Paleographic_Map_of_Earth,_45_Ma_(Lutetian_Age).png · Wikimedia Commons · See Wikimedia Commons

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پالئوژن

Also known as Palaeogene, Palæogene, Lower Tertiary, Paleogene Period, Paleogene System, Early Tertiary

The Paleogene Period ( ; also spelled Palaeogene or Palæogene) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period Ma (million years ago) to the beginning of the Neogene Period Ma. It is the first period of the Cenozoic Era, the tenth period of the Phanerozoic and is divided into the Paleocene, Eocene, and Oligocene epochs. The earlier term Tertiary Period was used to define the time now covered by the Paleogene Period and subsequent Neogene Period; despite no longer being recognized as a formal stratigraphic term, "Tertiary" still sometimes remain

AI overview

The Paleogene Period is a 43-million-year span of geological time that began after the extinction of the dinosaurs and is divided into three shorter epochs: the Paleocene, Eocene, and Oligocene. It matters because it represents the earliest part of the Cenozoic Era, when mammals began to diversify and dominate Earth's ecosystems following the end of the Cretaceous Period.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Geologic timespan.name: Paleogene
Geologic timespan.color: Paleogene
Geologic timespan.time_start: 66.0
Geologic timespan.time_end: 23.04
Geologic timespan.image_map: Mollweide Paleographic Map of Earth, 45 Ma (Lutetian Age).png
Geologic timespan.caption_map: A map of Earth as it appeared 45 million years ago during the Paleogene Period, Eocene Epoch
Geologic timespan.timeline: Paleogene
Geologic timespan.name_formality: Formal
Geologic timespan.alternate_spellings: Palaeogene, Palæogene
Geologic timespan.celestial_body: earth
Geologic timespan.usage: Global (ICS)
Geologic timespan.timescales_used: ICS Time Scale
Geologic timespan.chrono_unit: Period
Geologic timespan.strat_unit: System
Geologic timespan.timespan_formality: Formal
Geologic timespan.lower_boundary_def: Iridium enriched layer associated with a major meteorite impact and subsequent K-Pg extinction event.
Geologic timespan.lower_gssp_location: El Kef Section, El Kef, Tunisia
Geologic timespan.lower_gssp_accept_date: 1991