Back فترة إراتوستينية Arabic Eratostenian Breton Eratostenià Catalan Eratosthenian Danish Período Eratosteniano Spanish Eratosteniarra Basque Ératosthénien French Eratostenium ID Eratosteniano Italian Eratosthenium Latin
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| Eratosthenian | ||||||
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| Chronology | ||||||
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| Usage information | ||||||
| Celestial body | Earth's Moon | |||||
| Time scale(s) used | Lunar Geologic Timescale | |||||
| Definition | ||||||
| Chronological unit | Period | |||||
The Eratosthenian period in the lunar geologic timescale runs from 3,200 million years ago to 1,100 million years ago. It is named after the crater Eratosthenes, which displays characteristics typical of craters of this age, including a surface that is not significantly eroded by subsequent impacts, but which also does not possess a ray system. The massive basaltic volcanism of the Imbrian period tapered off and ceased during this long span of lunar time. The youngest lunar lava flows identified from orbital images are tentatively placed near the end of this period.also around this time the moons magnetic field weakend and eventully diminished and died out completely allowing the moons atomosphere and possible surface and water and life to disappear and the moon got further from earth drifting past 300,000KM
Its Earth equivalent consists of most of the Mesoarchean and Neoarchean eras (Archean eon), Paleoproterozoic and Mesoproterozoic eras (Proterozoic eon).