Copernican period
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The Copernican Period in the lunar geologic timescale runs from approximately 1.1 billion years ago to the present day. The base of the Copernican period is defined by impact craters that possess brig
The Copernican System on the near side of the Moon (Wilhelms, 1987)
The Copernican System on the far side of the Moon (Wilhelms, 1987)
Hayn
Jackson
Eratosthenian
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The Eratosthenian period in the lunar geologic timescale runs from 3.2 billion years ago to 1.1 billion years ago. It is named after the crater Eratosthenes, which displays characteristics typical of
Copernican period
…Copernican Chronology −4500 — – −4000 — – −3500 — – −3000 — – −2500 — – −2000 — – −1500 — – −1000 — – −500 — – 0 — Pre-Nectarian Nectarian Imbrian Eratosthenian Copernican Late Early Periods on the Lunar Geologic Timescale. Axis scale: Millions of years ago. Usage information Celestial body Earth's Moon Time…
Macrobius
Hausen
Olcott
Kirkwood