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Eratosthenian

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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.
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Other than Eratosthenes itself, examples of large Eratosthenian craters on the near side of the Moon include
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runs from 3,200 million years ago to 1,100 million years ago. It is named after the
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Periods on the Lunar Geologic Timescale. Axis scale: Millions of years ago.
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Ma
PreN
I
N
E
C
Pre-Nectarian
Nectarian
Imbrian
Eratosthenian
Copernican
Late
Early
Earth's Moon
Period
lunar geologic timescale
crater Eratosthenes
ray system
Imbrian

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