Statherian (Geological periods 🌍)

The Statherian Period is the final geologic period in the Paleoproterozoic Era and lasted from 1800 Mya to 1600 Mya. Instead of being based on stratigraphy, these dates are defined chronometrically. The period was characterized on most continents by either new platforms or final cratonization of fold belts. Oxygen levels were 10% to 20% of cu...

https://en.wikipedia.org/wiki/Statherian

#Statherian #Paleoproterozoic #GeologicalPeriods #ProterozoicGeochronology

Cretaceous (Geological periods 🌍)

The Cretaceous is a geologic period that lasted from about 143.1 to 66 Ma. It is the third and final period of the Mesozoic Era, as well as the longest. At around 77.1 million years, it is the ninth and longest geological period of the entire Phanerozoic. The name is derived from the Latin creta, 'chalk', which is abundant in the latter half of the period. It is usually abbreviated K, ...

https://en.wikipedia.org/wiki/Cretaceous

#Cretaceous #GeologicalPeriods

Statherian (Geological periods 🌍)

The Statherian Period is the final geologic period in the Paleoproterozoic Era and lasted from 1800 Mya to 1600 Mya. Instead of being based on stratigraphy, these dates are defined chronometrically. The period was characterized on most continents by either new platforms or final cratonization of fold belts. Oxygen levels were 10% to 20% of cu...

https://en.wikipedia.org/wiki/Statherian

#Statherian #Paleoproterozoic #GeologicalPeriods #ProterozoicGeochronology

Cryogenian (Geological periods 🌍)

The Cryogenian is a geologic period that lasted from 720 to 635 million years ago. It is the second of the three periods of the Neoproterozoic era, preceded by the Tonian and followed by the Ediacaran. The Cryogenian was a time of drastic climate changes. After the long environmental stability/stagnation during the Boring Billi...

https://en.wikipedia.org/wiki/Cryogenian

#Cryogenian #IceAges #Glaciology #Neoproterozoic #GeologicalPeriods #GeologyControversies

Statherian (Geological periods 🌍)

The Statherian Period is the final geologic period in the Paleoproterozoic Era and lasted from 1800 Mya to 1600 Mya. Instead of being based on stratigraphy, these dates are defined chronometrically. The period was characterized on most continents by either new platforms or final cratonization of fold belts. Oxygen levels were 10% to 20% of cu...

https://en.wikipedia.org/wiki/Statherian

#Statherian #Paleoproterozoic #GeologicalPeriods #ProterozoicGeochronology

Carboniferous (Geological periods 🌍)

The Carboniferous is a geologic period and system of the Paleozoic era that spans 60 million years, from the end of the Devonian Period 358.86 Ma to the beginning of the Permian Period, 298.9 Ma. It is the fifth period of the Phanerozoic eon. In North America, the Carboniferous is often treated as two separate geological periods, the earlier Mississippian and the later Pennsyl...

https://en.wikipedia.org/wiki/Carboniferous

#Carboniferous #GeologicalPeriods

Quaternary (Geological periods 🌍)

The Quaternary is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy, as well as the current and most recent of the twelve periods of the Phanerozoic eon. It follows the Neogene Period and spans from 2.58 million years ago to the present. The Quaternary ...

https://en.wikipedia.org/wiki/Quaternary

#Quaternary #GeologicalPeriods #PhysicalGeography #PhysicalOceanography

Ordovician (Geological periods 🌍)

The Ordovician is a geologic period and system, the second of six periods of the Paleozoic Era, and the second of twelve periods of the Phanerozoic Eon. The Ordovician spans 41.6 million years from the end of the Cambrian Period 486.85 Ma to the start of the Silurian Period 443.1 Ma. The Ordovician, named after the Welsh tribe of the Ordovices, was defined by Charle...

https://en.wikipedia.org/wiki/Ordovician

#Ordovician #GeologicalPeriods #1879InPaleontology

Tonian (Geological periods 🌍)

The Tonian is the first geologic period of the Neoproterozoic Era. It lasted from 1000 to 720 Mya. Instead of being based on stratigraphy, these dates are defined by the ICS based on radiometric chronometry. The Tonian is preceded by the Stenian Period of the Mesoproterozoic Era and followed by the Cryogenian. Rifting leading to the breakup of supercontin...

https://en.wikipedia.org/wiki/Tonian

#Tonian #Neoproterozoic #GeologicalPeriods #ProterozoicGeochronology

Ectasian (Geological periods 🌍)

The Ectasian Period is the second geologic period in the Mesoproterozoic Era and lasted from 1400 Mya to 1200 Mya. Instead of being based on stratigraphy, these dates are defined chronometrically. Geologically the name refers to the continued expansion of platform covers during this period. In the early Ectasian period, a day was 17 hours and 32 min...

https://en.wikipedia.org/wiki/Ectasian

#Ectasian #Mesoproterozoic #GeologicalPeriods #ProterozoicGeochronology