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...

Earth's Moon into five generally recognized periods: the Copernican, Eratosthenian, Imbrian (Late and Early epochs), Nectarian, and Pre-Nectarian. The...

is of the Imbrian and Eratosthenian age. Bullialdus crater, a prominent feature on the west side of the mare, is of Eratosthenian age. Other features within...

– −1500 — – −1000 — – −500 — – 0 — Pre-Nectarian Nectarian Imbrian Eratosthenian Copernican Late Early       Periods on the Lunar Geologic Timescale...

distance from the Earth to the Sun. Eratosthenes (crater) on the Moon. Eratosthenian period in the lunar geologic timescale. Eratosthenes Seamount in the...

– −1500 — – −1000 — – −500 — – 0 — Pre-Nectarian Nectarian Imbrian Eratosthenian Copernican Late Early       Periods on the Lunar Geologic Timescale...

features. Oldest to youngest: Aitkenian (pink), Nectarian (brown), Imbrian (greens/turquoise), Eratosthenian (light orange) and Copernican (yellow)....

near the exterior of the southwest wall. Diophantus is a crater of Eratosthenian age. This cleft follows a generally east–west path across the Mare Imbrium...

Five geologic systems/periods (Pre-Nectarian, Nectarian, Imbrian, Eratosthenian, Copernican), with the Imbrian divided into two series/epochs (Early...

Copernican unit consisting of craters with a ray system. Below this is the Eratosthenian unit, defined by craters with established impact crater morphology,...