The Imbrian is a lunar geologic period divided into two epochs, the Early and Late.
The Imbrian is a lunar geologic period divided into two epochs, the Early and Late.
==Early Imbrian== In the lunar geologic timescale, the Early Imbrian epoch occurred from 3,850 million years ago to about 3,800 million years ago. It overlaps the end of the Late Heavy Bombardment of the Inner Solar System. The impact that created the huge Mare Imbrium basin occurred at the start of the epoch. The other large basins that dominate the lunar near side (such as Mare Crisium, Mare Tranquillitatis, Mare Serenitatis, and Mare Fecunditatis) were also formed in this period. These basins filled with basalt mostly during the subsequent Late Imbrian epoch. The Early Imbrian was preceded by the Nectarian.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).