Seismic mapping of North America has revealed that an ancient slab of crust buried beneath the Midwest is causing the crust ...

The models indicated that the chemical signature of the protocrust matched that of today’s continental crust and suggested a global crust thickness of about 15 km—equivalent in chemical ...

Earth’s earliest crust, formed over 4.5 billion years ago, has long been thought to have lacked the complex chemical features associated with continental crust. However, a recent study published ...