January 28 - MANTLE AND CRUST o(anorthosite – 4.6 light...

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The Solar System Nebular Hypothesis - Direct/retrograde  Motion - Have a spin component to them, mutual gravitational attraction (towards  the sun)  - When the sun  started producing heat, most of the solar system is made out  of light material, and the only thing that crystallized in all that heat were  things with high melting points (closer to sun are rocky planets)  o At Jupiter, it freezes them  Planetary Geology - The Moon: what can you see? o Dark areas – MARIA o Light areas- HIGHALNDS o Craters—some very large  Moon Rocks - Igneous Rocks o Anorthosite:  4.7 billion years A ‘genesis’ rock, from the beginning of the earth  o Basalt: 3.8-3.2 billion years  - Impact Breccia: 3.9 billion years  o When you look at it, there are pieces of other rocks  o Happened when meteorites hit the rocks and were heated, then they  weld/stick together  o Caused rocks to break up  Lunar History - 4.6 billion years ago, MOON FORMS AND SEPARATES INTO CORE, 
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Unformatted text preview: MANTLE AND CRUST o (anorthosite – 4.6) light minerals that float to the top and form the crust -3.9: LARGE IMPACTS FORM MARE BASINS (lunar breccias – 3.9)-3.8-3.2: BASALT ERUPS IN BASINS (age of lunar basalts)-3.2 – present: LITTLE ACTIVITY Mercury-Temperature : +427 C to -173 C o Hot, close to the sun o Not the hottest planet, b/c has no atmosphere o Radiational cooling o Most difference in daytime high/nighttime low -Same size as moon, looks like moon , similar to the moon Venus-Earth’s sister planet (in size)-Carbon dioxide atmosphere, 90 X the Earth’s-+ 480 C—hottest planet o Can melt metal on its surface Mars-Thin atmosphere, mostly CO2, enormous ancient volcanoes, evidence of wind and water-MOST earth-like planet, in terms of surface conditions...
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January 28 - MANTLE AND CRUST o(anorthosite – 4.6 light...

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