J. B. Adams R. J. Collins J. Green G. P. Kuiper H. Mazursky J. A. O’Keefe R. A. Phinney E.M. Shoemaker D. E. Gault 1967 <p><span>Material of basaltic composition at the Surveyor V landing site implies that differentiation has occurred in the moon, probably due to internal sources of heat. The results are consistent with the hypothesis that extensive volcanic flows have been responsible for flooding and filling the mare basins. The processes and products of lunar magmatic activity are apparently similar to those of the earth.</span></p> application/pdf 10.1126/science.158.3801.641 en American Association for the Advancement of Science Surveyor V: Discussion of chemical analysis article