When 94-year-old Amy Craton accepted her diploma earlier this week, she become one of the world's oldest college graduates When 94-year-old Amy Craton accepted her diploma earlier this week, she ...

There are 35 large Archean cratons around the world that form the geologic core of tectonic plates. Because they’re located at the interior of plates, these landmasses often remain unaltered over the ...

How cratons—extremely stable continental areas of the Earth’s crust—formed and remained largely unchanged for more than 2,500 million years is much debated. Recent studies of seismic-wave receiver ...

There’s interesting stuff down there, the North American craton: the continental nucleus, made up of precambrian rock—”precambrian” being the period which covers the first four billion of the Earth’s ...

In the course of billions of years continents break up, drift apart, and are pushed back together again. The cores of continents are, however, geologically extremely stable and have survived up to 3.8 ...