oligocène wikipedia - EAS
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See all on Wikipediahttps://en.wikipedia.org/wiki/OligoceneThe Oligocene is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present (33.9±0.1 to 23.03±0.05 Ma). As with other older geologic periods, the rock beds that define the epoch are well identified but the exact dates of the start and end of the epoch … See more
The lower boundary of the Oligocene (its Global Boundary Stratotype Section and Point or GSSP) is placed at the last appearance of the foraminiferan genus Hantkenina in a quarry at Massignano, Italy. However, this GSSP … See more
The early Eocene climate was very warm, with crocodilians and temperate plants thriving above the Arctic Circle. The cooling trend that began in the middle Eocene continued into the Oligocene, bringing the poles well below freezing for the first time in the See more
Recorded extraterrestrial impacts:
• Haughton impact crater, Nunavut, Canada (23 Ma, crater 24 km (15 mi) diameter) (now considered … See moreDuring the Oligocene Epoch, the continents continued to drift toward their present positions. Antarctica became more isolated as deep ocean channels were established … See more
Climate during the Oligocene reflected a general cooling trend following the Early Eocene Climatic Optimum. This transformed the … See more
The Oligocene sees the beginnings of modern ocean circulation, with tectonic shifts causing the opening and closing of ocean gateways. Cooling of the oceans had already … See more
• La Garita Caldera (28–26 million years ago)
• Wah Wah Springs Caldera (30 million years ago) See moreWikipedia text under CC-BY-SA license- https://it.wikipedia.org/wiki/Oligocene
Nella scala dei tempi geologici, l’Oligocene è la terza e ultima epoca geologica del Paleogene e si estende da 33,9 ± 0,1 milioni di anni fa (Ma) a 23,03 Ma, preceduta dall'Eocene e seguita dal Miocene, la prima epoca del successivo Neogene.
Il nome "Oligocene" deriva dal greco ὀλίγος, "oligos" (poco) e καινός, "kainos" (nuovo, recente) e si riferisce allo scarso sviluppo di nuove specie di mammiferi, dopo la radiazione adattativa avvenut…Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 9 mins
- https://simple.wikipedia.org/wiki/Oligocene
WebThe Oligocene is the last geological epoch in the Palaeogene. It lasted for about 11 million years, from 34 million years ago to 23 million years ago. It was preceded by the Eocene …
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- https://fr.wikipedia.org/wiki/Oligocène
- Le début de l'Oligocène est défini par l'extinction des foraminifères planctoniques Hantkenina et Cribrohantkenina (en)[2]. La fin de l'Oligocène est définie par[2]: 1. le début de la chronozone magnétique C6Cn.2n 2. la plus faible présence des foraminifères planctoniques Paragloborotalia kugleri 3. la quasi-disparition des nanofossiles calcaires R...
- Niveau: Époque / Série
- Notation française: g
- Notation chronostratigraphique: E3
- https://en.wikipedia.org/wiki/Category:Oligocene_animals
WebSubcategories. This category has the following 15 subcategories, out of 15 total. Oligocene animals of Asia (4 C) Oligocene animals of Europe (1 C, 10 P) Oligocene animals of …
- https://en.wikipedia.org/wiki/Eocene–Oligocene_extinction_event
WebThe Eocene–Oligocene extinction event, also called the Eocene-Oligocene transition or Grande Coupure, is the transition between the end of the Eocene and the beginning of the Oligocene, an extinction event and …
- https://en.wikipedia.org/wiki/Category:Oligocene_mammals
WebOligocene cetaceans (1 C, 47 P) Oligocene even-toed ungulates (48 P) Oligocene mammals by continent (6 C) Oligocene odd-toed ungulates (2 C, 6 P) Oligocene …
- https://ro.wikipedia.org/wiki/Oligocen
WebOligocen. Oligocenul este a treia perioadă a paleogenului, care a durat de acum 33,9 ± 0,1 milioane de ani, până acum 23,03 milioane de ani. Epoca este caracterizată prin numuliți, …
- https://en.wikipedia.org/wiki/Pliocene
WebThe Pliocene is the epoch in the geologic time scale that extends from 5.333 million to 2.58 million years ago. It is the second and most recent epoch of the Neogene Period in the …
Oligocene - Wikipedia
https://in4adds.com/w/en/index.php?title=OligoceneWebTemplate:Short description Template:Distinguish Template:Infobox geologic timespan The Oligocene (Template:IPAc-en Template:Respell) is a geologic epoch of the Paleogene …
