1. Mare Fecunditatis (lunar mare); Sea of Fertility
Wikipedia definition
2. Mare FecunditatisMare Fecunditatis (the "Sea of Fecundity" or "Sea of Fertility") is a lunar mare which is 840 km in diameter. The Fecuditatis basin formed in the Pre-Nectarian epoch, while the basin material surrounding the mare is of the Nectarian epoch. The mare material is of the Upper Imbrian epoch and is relatively thin compared to Mare Crisium or Mare Tranquillitatis. This basin is overlapped with the Nectaris, Tranquillitatis, and Crisium basins.
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