Phanerozoic
| Aeonothem | Arathem | system | Age ( mya ) |
|---|---|---|---|
|
P h a n e r o z o i k u m Duration: 541 Ma |
Cenozoic Cenozoic Duration: 66 Ma |
quaternary | 0 ⬍ 2.588 |
| Neogene | 2,588 ⬍ 23.03 |
||
| Paleogene | 23.03 ⬍ 66 |
||
|
Mesozoic Mesozoic period: 186.2 Ma |
chalk | 66 ⬍ 145 |
|
| law | 145 ⬍ 201.3 |
||
| Triad | 201.3 ⬍ 251.9 |
||
|
Paleozoic Paleozoic period: 288.8 Ma |
Perm | 251.9 ⬍ 298.9 |
|
| Carbon | 298.9 ⬍ 358.9 |
||
| Devon | 358.9 ⬍ 419.2 |
||
| Silurian | 419.2 ⬍ 443.4 |
||
| Ordovician | 443.4 ⬍ 485.4 |
||
| Cambrian | 485.4 ⬍ 541 |
||
| earlier | earlier | earlier |
The Phanerozoic ( ancient Greek φανερός phanerós "visible", ζῷον zôon "living being", thus roughly translatable as the "age of visible life") is the youngest aeon or aeon theme in the history of the earth . It covers the period from 541 million years ago to the present.
The Phanerozoic follows the Proterozoic , Archean and Hadaic aeons , which are collectively referred to as the Precambrian . The Phanerozoic Era is divided into three eras : the Paleozoic Era , the Mesozoic Era and the Cenozoic Era . In contrast to the Precambrian, the Phanerozoic and its sub-units are subdivided with the help of the fossil record .
structure
The Phanerozoic is divided into the following aera themes :
To the subject
The origin of the term "Phanerozoic" is based on the fact that from the Cambrian - the lowest system (= earliest period) of the Paleozoic - fossil remains that were not only visible under the microscope appeared in large numbers for the first time . Fossil remains from the Precambrian have also been preserved, but these can usually only be recorded using microscopic methods (the Ediacaran fauna is an exception ). The period of the Precambrian, in which life appears for the first time on earth, is its youngest aeon, the Proterozoic (πρότερος próteros “previous”, “early”; “age of the earliest living beings”). This was earlier also called the Cryptozoic (κρυπτός kryptós "hidden").
See also
literature
- Hans Murawski, Wilhelm Meyer: Geological dictionary . Spectrum, Heidelberg 2004, ISBN 978-3-8274-1445-8 .
