Oligocene - Wikipedia
网页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 ...
Oligocene Epoch | Climate, Flora & Fauna | Britannica
网页Oligocene Epoch, third and last major worldwide division of the Paleogene Period (65.5 million to 23 million years ago), spanning the interval between 33.9 million to 23 million years ago. The Oligocene Epoch is subdivided into two ages and their corresponding rock stages: the Rupelian and the.
渐新世 - 百度百科
网页渐新世（Oligocene）是地质时代中 古近纪 （Paleogene）的最后一个主要分期，大约开始于3400万年前，终于2300万年前，介于 始新世 （Eocene）与 新近纪 的 中新世 （Miocene）之间。. 比起其他比较古老的 地质时期，用岩床来确认渐新世是良好的识别方 …
漸新世 - 维基百科，自由的百科全书
网页漸新世（Oligocene）是地質時代中古近紀的最後一個主要分期，大約開始於3400萬年前，終於2300萬年前，介於始新世（Eocene）與新近紀的中新世（Miocene）之間。比起其他比較古老的地質時期，用岩床來確認漸新世比较准确，但精確的起始與結束時間仍不確定。
Oligocene Epoch summary | Britannica
网页Oligocene Epoch, Major division of the Paleogene Period, from c. 33.9 million to 23 million years ago. It follows the Eocene Epoch and precedes the Miocene Epoch. The term (from the Greek for “few recent forms”) refers to the small number of modern animals that originated during this epoch.
Overview of the Oligocene Epoch - ThoughtCo
网页2019年2月28日 · The Oligocene epoch marked the continuing transition between the wildlife of the Eocene and Miocene epochs. Here's a look at prehistoric life during the Oligocene epoch.
Oligocene - New World Encyclopedia
网页The Oligocene follows the Eocene epoch and is followed by the Miocene epoch. The start of the Oligocene is marked by a extinction event that may be related to the impact of large extraterrestrial object in Siberia and/or near Chesapeake Bay.
The Oligocene Epoch (34-23 Million Years ago) - Paleontology …
网页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.
Oligocene Epoch - Geology Page
网页2014年4月29日 · The 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 period are well identified but the exact dates of the start and end of the period are slightly uncertain.
Evolution: Change: Deep Time - PBS
网页Oligocene Epoch (33-24 mya) By history's standards, the Oligocene is relatively uneventful, both geologically and biologically. Following the rapid cooling that ends the Eocene, the climate ...
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