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The Oligocene (IPA: / ˈ ɒ l ɪ ɡ ə s iː n,-ɡ oʊ-/ OL-ə-gə-seen, -goh-) [4] is a geologic epoch of the Paleogene Period that 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 ...
Oligocen (ang. Oligocene) w sensie geochronologicznym: najmłodsza epoka paleogenu, trwająca około 11 milionów lat (od 33,9 do 23,03 mln lat temu). Oligocen jest młodszy od eocenu a starszy od miocenu. Dzieli się na dwa wieki: rupel i szat.
Learn about the Oligocene Epoch, the third and last major division of the Paleogene Period, from 33.9 to 23 million years ago. Discover its marine and terrestrial life, climate, geology, and fossils, such as Indricotherium, mastodons, and monkeys.
The Oligocene was the last major geologic subdivision of the Paleogene period (65-23 million years ago), following the Paleocene (85-56 million years ago) and Eocene (56-34 million years ago) epochs; all of these periods and epochs were themselves part of the Cenozoic Era (65 million years ago to the present). Climate and geography.
7 kwi 2020 · The Oligocene represents a crucial time-span of the transformation of terrestrial phytocoenoses from primarily evergreen vegetation existing throughout most of the Palaeocene and Eocene, under distinct greenhouse conditions with high atmospheric CO 2 (Beerling & Royer, 2011; Collinson & Hooker, 2003) and very flat temperature gradients (Fricke ...
28 lut 2019 · The Oligocene epoch was a 10-million-year period of global cooling and sea level drop, with continental drift and mountain formation. It saw the evolution of grasslands, grazing mammals, whales, pinnipeds and terror birds.
29 maj 2018 · Learn about the Oligocene epoch, a geologic time period of 39 to 22 million years ago, marked by climate change, extinction, and evolution. Explore the features, events, and fossils of the Oligocene epoch in this comprehensive article.
