Radiometric dating of surface rocks
Radiometric dating of surface rocks - speed dating coquitlam
This all has to do with describing how long ago something happened. There are several ways we figure out relative ages.
This required them to liquefy the zircon samples in acid, destroying the space rock artefacts.When you talk about the Precambrian, Paleozoic, Mesozoic, and Cenozoic on Earth, or the Noachian, Hesperian, and Amazonian for Mars, these are all relative ages.Relative-age time periods are what make up the Geologic Time Scale.And the new research suggests that it happened earlier in the timeline of the Solar System than we thought - just 60 million years after our star system's birth, compared to previous estimates of 150 to 200 million years afterwards.To come up with the new lunar age estimate, the team analysed Moon rocks taken from the lunar surface during the Apollo 14 mission."The evolution of Earth could only have started after this impact," Barboni told The Verge.
"And that’s why it’s so important to date this impact, because you want to know when Earth started to evolve into the beautiful planet we all know today." While the new measurement is the most precise to date, some outside researchers have said that the act of dissolving the zircon in acid might have changed some of the results slightly, but Barboni says they accounted for these concerns.The Geologic Time Scale is up there with the Periodic Table of Elements as one of those iconic, almost talismanic scientific charts.Long before I understood what any of it meant, I'd daydream in science class, staring at this chart, sounding out the names, wondering what those black-and-white bars meant, wondering what the colors meant, wondering why the divisions were so uneven, knowing it represented some kind of deep, meaningful, systematic organization of scientific knowledge, and hoping I'd have it all figured out one day.Thanks to rocks collected during the Apollo 14 mission, researchers say they’ve finally pinpointed the exact age of the Moon, and it turns out, our lunar neighbour is an incredible 4.51 billion years old.These findings suggest that the Moon was formed roughly 60 million years after the Solar System first formed, making it up to 140 million years older than previous estimates.So instead of trying to find chunks of rock that had been there since the early days, the team instead turned to zircon - a mineral that would have formed as the Moon was cooling from its fresh, molten state into the rocky satellite we see today.