Encyclopedia of the Solar System 2nd ed

240 Encyclopedia of the Solar System FIGURE 16 The distinction between the maria and highlands is clearly shown in this view of ...

The Moon 241 the basins form the maria, as in Mare Imbrium (see Figs. 1 and 14) or Mare Ingenii (see Fig. 16). The basins, as in ...

242 Encyclopedia of the Solar System breccias range in age from 3.9 to 4.3 billion years. The oldest basalt from a visible maria ...

The Moon 243 TABLE 2 Elemental Abundancesa Oxide (weight Cl Earth Mantle Bulk Highlands Low-Ti High-Ti percent) +Crust Moon Basa ...

244 Encyclopedia of the Solar System FIGURE 19 The abundances of rare earth elements in the source regions of the mare basalts, ...

The Moon 245 8.5 Kreep Basalt KREEP basalt, an enigmatic rock type with only a few undisputed examples, is highly enriched in in ...

246 Encyclopedia of the Solar System FIGURE 20 Major lunar crustal terranes. The Procellarum KREEP Terrane (PKT) is on the nears ...

The Moon 247 contains about 25% metallic Fe; the Moon, less than about 2–3%. However, the bulk Moon contains 12–13% FeO, 50% mor ...

248 Encyclopedia of the Solar System These are not all mutually exclusive, and elements of some hypotheses occur in others. For ...

The Moon 249 In the closing stages of the accretion of the terrestrial planets 50–100 million years afterT 0 (4567 million years ...

250 Encyclopedia of the Solar System Canup, R. M. (2004). Dynamics of lunar formation.Annu. Rev. Astron. Astrophys.42,441–475. C ...

100-C 25-C 50-C 75-C C+M 50-C+M C+Y 50-C+Y M+Y 50-M+Y 100-M 25-M 50-M 75-M 100-Y 25-Y 50-Y 75-Y 100-K 25-K 25-19-19 50-K50-40-40 ...

252 Encyclopedia of the Solar System TABLE 1 Numbers of Classified Non-Antarctic Meteorite Falls and Finds, Including Those from ...

Meteorites 253 (a) (b) FIGURE 1 Fusion crusts: (a) Noblesville H chondrite; (b) Lafayette Martian meteorite. Noblesville, which ...

254 Encyclopedia of the Solar System FIGURE 2 From nebula to meteorite: genetic processes and the corresponding age determinable ...

Meteorites 255 FIGURE 4 Concentrations of cosmic ray–produced radioactive and stable nuclides during cosmic ray exposure and aft ...

256 Encyclopedia of the Solar System (a) (b) (c) (d) FIGURE 5 Large meteoroids: (a) fireball of 80-m object (estimated mass, 1 M ...

Meteorites 257 FIGURE 6 Cross section of Antarctic ice sheet and subice topography: meteorites fall (1), are collected by the ic ...

258 Encyclopedia of the Solar System (a) (b) FIGURE 7 Meteorite classifications: (a) the most common classes and some chemical-p ...

Meteorites 259 FIGURE 8 Common meteorite types (approximate longest dimension in cm): (a) Whitman, H5 (6 cm); (b) Allende; C3V ( ...