What happened during the Eocene period?
The Eocene Epoch saw the replacement of older mammalian orders by modern ones. Hoofed animals first appeared, including the famous Eohippus (dawn horse) and ancestral rhinoceroses and tapirs. Early bats, rabbits, beavers, rats, mice, carnivorous mammals, and whales also evolved during the Eocene Epoch.
What was the Eocene period?
Paleogene
Eocene/Period
Eocene Epoch, second of three major worldwide divisions of the Paleogene Period (66 million to 23 million years ago) that began 56 million years ago and ended 33.9 million years ago. It follows the Paleocene Epoch and precedes the Oligocene Epoch.
What were the major geologic events of the Paleogene period?
The Geography of the Paleogene
| Epoch | Geographic event |
|---|---|
| The Oligocene | Australia separates from Antarctica India crashes into Asia creating the Himalayan Mountains Antarctica is covered by glaciers Sea levels are low |
| The Eocene | North America and Europe separate |
What is the name of the earliest mammal that lived in the Eocene time period?
These include the first members of the orders of elephants, bats, whales, even-toed hooved animals (artiodactyls) and the odd-toed perissodactyls. The first horse, Hyracotherium (aka eohippus), appeared in the eocene.
How long did the Eocene period last?
The Eocene ( /ˈiː. əˌsiːn, ˈiː. oʊ-/ EE-ə-seen, EE-oh-) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya).
What caused the Eocene?
The Paleocene/Eocene thermal maximum (PETM) was a time of rapid global warming in both marine and continental realms that has been attributed to a massive methane (CH4) release from marine gas hydrate reservoirs.
What is Paleogene period known for?
The Paleogene is most notable for being the time during which mammals diversified from relatively small, simple forms into a large group of diverse animals in the wake of the Cretaceous–Paleogene extinction event that ended the preceding Cretaceous Period.
What is Eocene epoch and Eocene primates?
The known fossil families of the Eocene Epoch (56 million to 33.9 million years ago) include the Tarsiidae (tarsiers), the Adapidae (which include probable ancestors of lemurs and lorises), and the Omomyidae (which include possible ancestors of the monkeys and apes).
How long ago was the Eocene period?
56 million years ago – 33.9 million years ago
Eocene/Occurred
Where was the Ypresian stage of the Earth located?
The Ypresian Stage was originally introduced by Dumont (1849) to include the clayey to fine-sandy shelf-facies strata lying between the terrestrial to marginally marine Landenian (see section 28.1.4 .1) and the marine Brusselian (see section 28.1.6 .1) in western Belgium.
What are the names of the stages of the Eocene?
The corresponding rocks are referred to as lower, middle, and upper Eocene. The Ypresian stage constitutes the lower, the Priabonian stage the upper; and the Lutetian and Bartonian stages are united as the middle Eocene. During the Eocene, the continents continued to drift toward their present positions.
How did the early Eocene affect the atmosphere?
Atmospheric greenhouse gas evolution. The warm temperatures during the early Eocene could have increased methane production rates, and methane that is released into the atmosphere would in turn warm the troposphere, cool the stratosphere, and produce water vapor and carbon dioxide through oxidation.
When was the Cenozoic era divided into sub eras?
After decades of inconsistent usage, the newly formed International Commission on Stratigraphy (ICS), in 1969, standardized stratigraphy based on the prevailing opinions in Europe: the Cenozoic Era subdivided into the Tertiary and Quaternary sub-eras, and the Tertiary subdivided into the Paleogene and Neogene periods.