ArticlesAge Measurements

Rubidium-Strontium Relations in Tranquillity Base Samples

Science  30 Jan 1970:
Vol. 167, Issue 3918, pp. 473-474
DOI: 10.1126/science.167.3918.473


Preliminary total rock analyses disclosed a greatly different rubidium depletion between two groups of these igneous rocks, and ratios of strontium-87 to strontium-86 indicate that the rubidium depletion in these materials must have occurred during or shortly after the accretion of the terrestrial planets.