Era zeolozega
Inte la cronostratigrafìa, na era zeolòzega ła xe una de le sudivixion de ła scala dei tenpi zeolozeghi. Le ere le vien spartie so la baze de eventi e o ełementi pì fasilmente riscontrai inte la stratificasion, par exenpio l’era Mesozoica, ła xe conprexa tra do estinsion de masa: queła del Permian-Triasego, e ła pì conosùa del Cretaseo-Paleozen .
Ragrupamenti e sudivixion
Le ere le xe a so volta ragrupae in tre eoni: archeo, proterozoico e fanerozoico. Soło che l’eon Hadean, el pì vecio de tuti, no’l xe divixo in epoche. Pì precisamente, na era ła rapresenta el tenpo pasà durante ła formasion de łe piere che łe fa el corispondente eratema[1]. Na era ła fa parte de un eon spesifego e ła xe divixa, al so interno, in periodi.
Lista de le ere zeolozeghe
| Era zeolozega (Ma = mijioni de ani fa) | Periodi |
|---|---|
| Eoarchean dal 4000 Ma al 3600 Ma | |
| Paleoarchean dal 3600 Ma al 3200 Ma | - |
| Mesoarcheoan dal 3200 Ma al 2800 Ma | - |
| Neoarchean dal 2800 Ma al 2500 Ma | - |
| Paleoproterozoico dal 2500 Ma al 1600 Ma | Siderian, Rhyacian, Orosirian, Statherian |
| Mezoproterozoico dal 1600 Ma al 1000 Ma | Calymian, Ectasian, Stenian |
| Neoproterozoico dal 1000 Ma al 541 Ma | Tonianoan, Cryozenian, Ediacaran |
| Paleozoico dal 541 Ma al 251.902 ± 0,024 Ma | Cambrian, Ordovician, Silurian, Devonian, Carbonifaro, Permian |
| Mezozoico da 251.902 ± 0,024 Ma al 66,0 Ma | Triasego, Giurasego, Cretaceo |
| Cenozoico dal 66,0 Ma al presente | Paleozen, Neozen, Quatarnario |
Notasion
- ↑ stratigraphy.org, https://stratigraphy.org/guide/chron.
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