Third lunar mineral - Tranquillityite found in Western Australia
Thursday, January 5, 2012 - 08:01
in Earth & Climate
(PhysOrg.com) -- Back in the heyday of the Apollo moon program, hundreds of pounds of rock samples were carted back to Earth by visiting astronauts. Those samples were then pored over more thoroughly by geologists than perhaps any other rocks in human history, and after all that study, three minerals were found that were unique to the moon: armalcolite, pyroxferroite and tranquillityite. The first two were subsequently found over the next ten years on the surface of the Earth as well, but the third, named after Tranquility Base, site of the first moon landing, had never been found here on this planet, at least not naturally, tranquillityite has been found in meteorite samples. But now that’s changed.