Gas-retention and cosmic-ray exposure ages of lunar rock 15555.


The last lava flow in the Hadley Rille area of Mare Imbrium, as inferred from an argon-40-argon-39 experiment on a plagioclase separate from the lunar basalt 15555, occurred 3.31+/-0.03x10(9) years ago. An argon-40-argon-39 experiment on a whole rock sample shows significant loss of radiogenic argon-40 and yields a well-defined, high-temperature plateau… (More)


Cite this paper

@article{Podosek1972GasretentionAC, title={Gas-retention and cosmic-ray exposure ages of lunar rock 15555.}, author={Frank A. Podosek and J. C. Huneke and Gerald J. Wasserburg}, journal={Science}, year={1972}, volume={175 4020}, pages={423-5} }