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Open access bot: pmc updated in citation with #oabot.

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{{Infobox geologic timespan
| name = Uintan
| color = Uintan
| time_start = 46.2
| time_end = 42.0
| image_map =
| caption_map =
| image_outcrop =
| caption_outcrop =
| image_art =
| caption_art =

| timeline = Paleogene
| formerly_part_of = [[Tertiary period|Tertiary]] [[Geological period|Period]]/[[System (stratigraphy)|System]]
| partially_contained_in =
| partially_contains =

| name_formality = Formal
| name_accept_date =
| alternate_spellings =
| synonym1 =
| synonym1_coined =
| synonym2 =
| synonym2_coined =
| synonym3 =
| synonym3_coined =
| nicknames =
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| proposed_names =

| celestial_body = earth
| usage = Global ([[International Commission on Stratigraphy|ICS]])
| timescales_used = ICS Time Scale
| formerly_used_by =
| not_used_by =

| chrono_unit = Age
| strat_unit = Stage
| proposed_by =
| type_section =
| timespan_formality = Formal
| upper_def_candidates = Calcareous nannofossil near [[Last appearance datum|LAD]] of the [[Haptophyte]] ''[[Reticulofenestra|Reticulofenestra reticulata]]''
| upper_gssp_candidates = Contessa highway section, [[Gubbio]], [[Apennines|Central Apennines]], [[Italy]]

| o2 =
| co2 =
| temp =
| sea_level =
}}
The '''Uintan North American Stage''' is the North American [[faunal stage]], typically set from 46,200,000 to 42,000,000 years before present lasting 4.2 million years.<ref>[https://web.archive.org/web/20071029224651/http://paleodb.org/cgi-bin/bridge.pl?action=displayInterval&interval_no=229 Paleobiology Database, Uintan]</ref> The Uintan Stage is a key part of the [[North American land mammal age|North American Land Mammal Age]]. In the [[Uinta Basin]], a thriving subtropical ecosystem was formed at around 46.0 million years ago. It falls within the [[Eocene]] epoch, preceded by the [[Bridgerian]] and followed by the [[Duchesnean]] NALMA stages.<ref>{{Cite web |title=GeoWhen Database - Uintan |url=https://timescalefoundation.org/resources/geowhen/stages/Uintan.html |access-date=2025-06-01 |website=timescalefoundation.org}}</ref> The Uinta Formation is a key piece of this geologic stage. Mammalian [[Machairodontinae|sabretooths]] evolved and became dominant predators in the now-Western United States. These included ''[[Apataelurus]]'', ''[[Diegoaelurus]],'' and ''[[Machaeroides]]''.<ref>{{Cite journal |last=Zack |first=Shawn P. |date=2019-11-22 |title=The first North American Propterodon (Hyaenodonta: Hyaenodontidae), a new species from the late Uintan of Utah |url=https://peerj.com/articles/8136 |journal=PeerJ |language=en |volume=7 |pages=e8136 |doi=10.7717/peerj.8136 |doi-access=free |issn=2167-8359|hdl=10150/636415 |hdl-access=free |pmc=6876642 }}</ref><ref>{{Cite journal |last1=County~tom@tskelly.gardnerville.nv.us |first1=Thomas S. Kelly~Natural History Museum of Los Angeles |last2=History~pmurphey@sdnhm.org |first2=Paul C. Murphey~San Diego Museum of Natural |date=2016-07-14 |title=Mammals from the earliest Uintan (middle Eocene) Turtle Bluff Member, Bridger Formation, southwestern Wyoming, Part 1: Primates and Rodentia |url=https://palaeo-electronica.org/content/2016/1518-earliest-uintan-mammals |access-date=2025-06-01 |journal=Palaeontologia Electronica |doi=10.26879/586 |language=en|doi-access=free }}</ref>

==Substages==
[[File:Uinta Formation, Uintah County, Utah.jpg|left|thumb|Uinta Formation, Uintah County, Utah, United States]]
The Uintan is considered to be contained within the [[Lutetian]] sharing the upper boundary and contains the following substages:
*Late/Upper Uintan: Lower boundary source of the base of the Uintan (approximate).
*Early/Lower Uintan: Upper boundary source of the base of the [[Duchesnean]] (approximate)

==References==
{{reflist}}

{{Paleogene Footer}}

[[Category:Uintan| ]]
[[Category:Eocene life]]
[[Category:Eocene animals of North America]]

{{geochronology-stub}}

Uintan - Revision history

imported>OAbot: Open access bot: pmc updated in citation with #oabot.