Moon rocks dating

None of the many samples that we have been sent has been a lunar meteorite, except those from meteorite dealers, persons who bought lunar meteorites from a dealer, or experienced meteorite prospectors who found them in the deserts of northern Africa or Oman.No lunar meteorite has yet been found in North America, South America, or Europe.About one third of these were discovered by US and Japanese teams searching for Antarctic meteorites (e.g., ANSMET), with most of the remainder having been discovered by collectors in the desert regions of northern Africa and Oman.Rocks from the Moon have been measured by radiometric dating techniques.Moon rocks on Earth come from three sources: those collected by the US Apollo manned lunar landings from 1969 to 1972; samples returned by three Soviet Luna unmanned probes in the 1970s; and rocks that were ejected naturally from the lunar surface by cratering events and subsequently fell to Earth as lunar meteorites.During the six Apollo landing missions, 2,415 samples weighing 380.96 kilograms (839.87 lb) were collected.In contrast, the oldest ages of rocks from the Earth are between 3.8 and 4.28 billion years old.In the 1970s, scientists subjected newly arrived samples of moon rocks to a barrage of tests.

Many experienced meteorite collectors have been looking and none have yet succeeded.That suggests the number of rocks hitting the moon suddenly spiked at that time — evidence for a Late Heavy Bombardment.Geochemists Patrick Boehnke and Mark Harrison of UCLA took a second look at the data.This article is within the scope of Wiki Project Spaceflight, a collaborative effort to improve the coverage of spaceflight on Wikipedia.If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.

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