1. Minerals and Origin of the Moon Triana Henz

2. Formation Theories Fission Capture Co-formation Giant Impact

3. Data High angular momentum Low iron core Identical abundances of oxygen isotopes

4. Giant Impact Exchange

5. Giant Impact Uncertainty Faster cooling rate Rotation of disk might have inhibited radial diffusion Either enrich or same as the Earth in REE, thorium, uranium, zirconium and FeO

6. Mineral Make up Thick crust has feldspar and pyroxene Feldspar is mainly anorthite (CaAl2Si2O8 ), especially if the melt is pyroxene and olivine rich Low density means that it most likely doesn’t have an iron core Same density as ordinary rock

8. Phenomenon Pristine highland rocks are extremely rare Probably due to “gardening” of the surface Highland is made from molten lunar material that crystallized slowly from deep inside Magma ocean froze over Radioactive isotopes decayed, warming up interior Basalt erupted to low areas

9. Composition Olivine: dense, in interiors and lava Pyroxene: constituent in interiors where metallic iron is present Feldspar: less dense, crust Ilmenite: lava, titanium bearing

10. Composition Eutectic composition can shift with pressure Determine depth of lava source

11. Composition REE fit in where they can Feldspars rejects lighter REE Feldspars accepts denser REE Pyroxene is opposite Olivine rejects all Europium (Eu) is a characteristic of feldspars

12. References Taylor, G. J. (2008). "Compositional Balancing Before Moon Formation." Planetary Science Research Discoveries. http://www.psrd.hawaii.edu/Feb08/EarthM oonFormation.html