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Geologic map of the Byrgius Quadrangle of the Moon Geologic map of the Byrgius Quadrangle of the Moon
The Byrgius quadrangle, at the western edge of the near side, lies in the terra southwest of Oceanus Procellarum between the Humorum and Orientale basins. Structures and deposits related to the Orientale basin, which is younger than the Humorum basin (Hartmann and Kuiper, 1962), dominate the southwestern half of the quadrangle. The northeastern half is dominated by mantling deposits that...
Geologic map of the Grimaldi quadrangle of the Moon Geologic map of the Grimaldi quadrangle of the Moon
The Grimaldi quadrangle lies at the southwest margin of Oceanus Procellarum about 1,000 km east of Orientale, the youngest of the lunar multi-ringed basins. The distal ends of the ejecta blanket surrounding the Orientale basin partly covers the western third of the quadrangle. The relatively small, two-ring Grimaldi basin is in the northwest corner of the quadrangle, and the Humorum...