Blog Posts Tagged "Radiometric dating"

So How Do Scientists Figure Out How Old Rocks Are?

To figure out the spreading rates of various places in the seafloor, scientists compare the ages of rock samples taken from those places. It is not easy to figure out how old a rock is. They do not have growth rings like a tree nor do they have bruises caused by their aunt Barbara pinching them to grow an inch every time they have a birthday.

Quest for Zircons

When the Superfast science party ages the rocks in the cores from this expedition, they will do so with zircons. Zircon sounds like the name of an evil Martian tyrant in a 1950’s science fiction movie, but it is actually a mineral that can form within an igneous rock when magma first cools into rock.