Figure 14
| This highly simplified geologic map distinguishes between the two
major types of lunar terrain. Mare areas are shown in black, and terra
or highland areas are shown without overprint as they appear on "The Earth's
Moon" [courtesy of the National Geographic Society]. The unequal distribution
of mare materials is shown to advantage on this equal area projection.
Also clearly evident is the tendency of mare materials to be concentrated
within the margins of large multiringed circular basins. The Serenitatis
(7), Crisium (12), Moscoviense (17), Ingenii (18), and Orientale (19) Maria
are especially good examples. The broad irregular expanse of mare material
known as Oceanus Procellarum is another type of occurrence.- G.W.C.
|
1 Oceanus Procellarum
2 Mare Imbrium 3 Mare Cognitum 4 Mare Humorum 5 Mare Nubium 6 Mare Frigoris 7 Mare Serenitatis 8 Mare Vaporum 9 Mare Tranquillitatis 10 Mare Nectaris 11 Mare Humboldtianum 12 Mare Crisium 13 Mare Fecunditatis 14 Mare Marginis 15 Mare Smythii 16 Mare Australe 17 Mare Moscoviense 18 Mare Ingenii 19 Mare Orientale |
