1. PSRDPSRD presents www.psrd.hawaii.edu/Sept08/MoonWater.html The Bone-Dry Moon Might be Damp The idea that the Moon is almost totally devoid of water has been around since the return of the first lunar samples in 1969 New analyses of lunar volcanic glasses suggest that the idea is wrong Orange volcanic glass deposit in field and thin section.

2. PSRDPSRD presents www.psrd.hawaii.edu/Sept08/MoonWater.html The Bone-Dry Moon Might be Damp H 2 O is correlated with S, F, and Cl Shows that all have been lost by diffusion after eruption, not added by other sources such as solar wind implantation

3. PSRDPSRD presents www.psrd.hawaii.edu/Sept08/MoonWater.html The Bone-Dry Moon Might be Damp Calculations show that the volatile loss is best matched by cooling at 2ºC/second and if the initial H 2 O was 745 ppm—far from a bone dry Moon.

4. PSRDPSRD presents www.psrd.hawaii.edu/Sept08/MoonWater.html The Bone-Dry Moon Might be Damp The amount of H 2 O in the Moon affects our understanding of processes in the proto-lunar disk, the result of a giant impact with the growing Earth.