MOON ROCKS YIELD FORMATION CLUES
leading scientists from major Western nations rept detailed study of lunar samples brought back by astronauts N A Armstrong, Col Aldrin and Col Collins indicates moon could only have been torn from earth during earth's formation or immediately afterward, conf session; say soil samples from Sea of Tranquility landing site are 4.6-billion yrs old; Drs G J Wasserburg, M G Simmons, H Alfven and M Tatsumoto comment; illus of microcrater found among samples (W Sullivan rept)